A species of ass, Equus hemionus, native to Asia; the onager.

(idiomatic, vulgar, chiefly US, Canada) To clobber someone; to beat someone severely. / (literally, vulgar, chiefly US, Canada) To actually kick someone in the buttocks.

Synonym of watch one's back

(US, slang) To bet everything; to have total reliance or confidence in something.

(vulgar) Synonym of pain in the ass

(idiomatic, vulgar) To be very lazy and idle, especially when immediate action is required.

simple past tense and past participle of sit on one's ass

Third-person singular simple present indicative form of sit on one's ass

present participle of sit on one's ass

Alternative form of bite my ass