stuff up
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
To ruin or harm.
Register: slang
Where it’s used:
Used
American English
Examples
Don't drink tonight, because it'll stuff you up before your business trip.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 2
Meaning · English
To make a big mistake.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 3
Meaning · English
To cause (the nasal passages) to be blocked.
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “stuff up” mean?
To ruin or harm.
Is “stuff up” formal or informal?
stuff up is generally slang.