1.
urine; pee; urination
A direct, coarse word for urine or urinating. Common in everyday male speech and informal writing, but considered crude in polite contexts.
2.
backing out; reneging on a deal (slang)
Used in expressions like 小便する to mean breaking a promise, walking away from a deal, or pulling out of an arrangement. Rough, informal register.
Literally "small convenience," paired with 大便 ("large convenience," feces). In polite or medical contexts, use 尿 or おしっこ instead. 小便 sounds rough and is more common in male speech.
Common collocations
- 小便をする: to urinate
- 立ち小便: urinating in public (a punishable minor offense)
- 小便小僧: "the peeing boy" — a famous statue, also a metaphor for someone immature
Register
- おしっこ: pee — childish/cute, used by children or with children
- 尿: urine — clinical/medical
- 小用: number one — softer, often used in older or polite speech
- 小便: pee, piss — rough, masculine register
Sense 2 note
"To back out" usage is slangy and rare in polite contexts; common in business gossip and rough speech.
Related Words
Compare:
大便 (feces)