Cancerous means: Extremely unpleasant; detestable.. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
cancerous
(slang) Extremely unpleasant; detestable.
Seen in the wild
5 citations · last seen May 2026
Seen in the wild
BlueskyMay 2026
So the fourth Gulf War goes on, spreading its cancerous violence further by the day.
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BlueskyMay 2026
How the “adults in the room”, actual adults, can stand there and smile wistfully while that cancerous blob sits in a chair and spouts lies is cruel and beyond unconscionable. The parents of these kids should be ashamed.
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BlueskyMay 2026
Mapping Cancerous Tissue with a Hand-Held Probe https://www.newsbeep.com/nz/413082/ Taking advantage of the mechanical differences between healthy tissue and tumors, a wireless probe can aid surgeons in…
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BlueskyMay 2026
The failure to include trans voices in coverage of trans issues is a profession-wide disease, but nowhere is it more cancerous than in nyt coverage.
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BlueskyMay 2026
Realizing that billionaires only exist because they exploit an archaic legal system and that in nature they'd be (at best) banished from society for being the cancerous sociopaths they are is the first step in eating…
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Definitions
US
#1·Apr 26, 2026US
(slang) Extremely unpleasant; detestable.
On Sunday at five they operated to remove the cancerous kidney.
For parents
Cancerous means: Extremely unpleasant; detestable.. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
For ESL learners
cancerous means: Extremely unpleasant; detestable.. Register: very informal, slang. Suitable only for casual conversation, chat and social media. Do not use in business, academic or news writing. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.
Cluster: intensifier
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US
#2·Apr 26, 2026US
(figuratively) Growing or spreading rapidly to the point of harm.
I love this show, but the fanbase is so toxic and cancerous.
Heard in the wild
“So the fourth Gulf War goes on, spreading its cancerous violence further by the day.”
— Bluesky· May 2026“How the “adults in the room”, actual adults, can stand there and smile wistfully while that cancerous blob sits in a chair and spouts lies is cruel and beyond unconscionable. The parents of these kids should be ashamed.”
— Bluesky· May 2026“Mapping Cancerous Tissue with a Hand-Held Probe https://www.newsbeep.com/nz/413082/ Taking advantage of the mechanical differences between healthy tissue and tumors, a wireless probe can aid surgeons in…”
— Bluesky· May 2026“The failure to include trans voices in coverage of trans issues is a profession-wide disease, but nowhere is it more cancerous than in nyt coverage.”
— Bluesky· May 2026“Realizing that billionaires only exist because they exploit an archaic legal system and that in nature they'd be (at best) banished from society for being the cancerous sociopaths they are is the first step in eating billionaires.”
— Bluesky· May 2026
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US
#3·Apr 26, 2026US
(oncology) Relating to or affected with cancer.
On Sunday at five they operated to remove the cancerous kidney.
Origin: From , from , from crab; tumor, cancer + -ōsus.. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
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For specific readers
Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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Other words near "cancerous" (C)
canautcan but hopecancelcancel someone's Christmascancercancerettecancer stickCancerTokcancervativeCanConcandidatingcandidature
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