tit
arse over tit: seearse.
get on someone's tits irritate someone intensely. British vulgar slang
2002Sunday Herald One thing that really gets on my tits is the no-can-do attitude.
go tits up collapse in failure. vulgar slang
☞ The expression probably arose as a variant of go belly up (see atbelly).
1983Lynda La PlanteWidows I don't want to see what's in those ledgers, cos if this is for real and it all goes tits up, I'm denying everything. The less I know, the better.
tit for tat a situation in which an injury or insult is given in return or retaliation.
tits and bums used in reference to the use of crudely sexual images of women. vulgar slang, chiefly British
☞ The variant tits and ass is chiefly North American.