"P0" means: Priority Zero — the most-urgent possible bug or task. Drops everything; whoever is on it has authority to break process to fix it. Some comp.... This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.
P0
Priority Zero — the most-urgent possible bug or task.
Definitions
Global
#1·May 2, 2026Globalcasual
Priority Zero — the most-urgent possible bug or task. Drops everything; whoever is on it has authority to break process to fix it. Some companies use P1; Google and Meta use P0.
For parents
"P0" means: Priority Zero — the most-urgent possible bug or task. Drops everything; whoever is on it has authority to break process to fix it. Some comp.... This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.
For ESL learners
"P0" means: Priority Zero — the most-urgent possible bug or task. Drops everything; whoever is on it has authority to break process to fix it. Some comp.... Register: neutral, standard English, usable in most everyday contexts. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.
Source: Slangora editorial
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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 "P0" (P)
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Semantically related
- pix0r50%
(internet slang, leet) picture.
- 📌48%
A red round-headed pushpin pin. Means "this is important, don't lose it" — used to flag a message for follow-up, to mark a thread's key takeaway, or as a header for "pinned info". Standard in work Slack, Discord servers and Telegram groups where a message gets the 📌 prefix to mark its priority. Often appears at the top of FAQ posts, sticky-thread comments and bio sections.
- principal48%
Primary; most important; first level in importance.
- pix0r48%
An early internet leet-speak (1337speak) rendering of "picture" or "pic," where the "c" becomes a zero and the ending gets the characteristic "-or" or "-0r" suffix that was everywhere in early hacker and gaming culture. Back in the late 1990s and early 2000s, writing like this was a badge of internet-insider status — part joke, part code, part tribal language. "Pix0r" is delightfully retro now, but it captures a specific era of online culture perfectly.
- ping me47%
"Send me a message on Slack/Teams when you need me." Has fully replaced "email me" for anything under an hour's attention. "Ping me when the deploy finishes" implies a 15-second check-in, not a scheduled follow-up. Emails are for archival; pings are for right now.