Arc up means: To become upset or angry.. It is mainly Australian English and may not be understood outside that context. 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.
arc up
(Australia, slang, intransitive) To become upset or angry.
Definitions
#1·Apr 26, 2026
(Australia, slang, intransitive) To become upset or angry.
Origin: Thought to be from electrical arcs created when starting/booting/arcing up an electrical device. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents
Arc up means: To become upset or angry.. It is mainly Australian English and may not be understood outside that context. 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
arc up means: To become upset or angry.. 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: angry
Heard in the wild
“51) Limbus Company - Twinning Threads (10/10) Favorite intervallo so far. Continues the exploration into Ryoshu and her relationship with the Nursefathers as well as where she goes on from here. Also a fantastic capstone for Gregor's arc up to this point. Amazing stuff here.”
— Bluesky· May 2026
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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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🗺️About Regional & Other slang
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.
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