"jazillion" means an unspecified large number (of). It is one of many casual words teens pick up from friends, social media, music or sport, and on its own it carries no particular warning. If you hear your teen use it, it is fair to ask what they mean by it in their friend group, since meanings drift quickly. Asking out of curiosity rather than alarm tends to keep the conversation open and useful.
jazillion
(slang, hyperbole) An unspecified large number (of).
d͡ʒəˈzɪljənDocumented since 1990s1990sMillennialhistorical163 viewsLast reviewed Jun 29, 2026＋ Add a definition
Etymology timeline
Born ~1990 · no dated citations yetMillennial / early-internet eraSee decade cohort →
Definitions
Global
#1·Apr 27, 2026Global
(slang, hyperbole) An unspecified large number (of).
For parents
"jazillion" means an unspecified large number (of). It is one of many casual words teens pick up from friends, social media, music or sport, and on its own it carries no particular warning. If you hear your teen use it, it is fair to ask what they mean by it in their friend group, since meanings drift quickly. Asking out of curiosity rather than alarm tends to keep the conversation open and useful.
For ESL learners
"jazillion" is informal English meaning an unspecified large number (of). It is used widely across English varieties. A more formal or neutral equivalent would be something like "an unspecified large number (of)" expressed in standard vocabulary. A common mistake is to assume "jazillion" can replace its standard equivalent in every register; keep it for spoken or casual situations and use the formal form in writing. If you are a B2 or C1 learner, it is useful to recognise this word when you hear or read it, but think carefully about whether the situation really calls for it before using it yourself.
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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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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.
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