a hair across (one's) ass
(redirected from a hair across their asses)a hair across (one's) ass
rude slang What one is said to have if they are intensely annoyed or irritated. Everybody who lives on this side of town has gotten a hair across their ass ever since the construction of the new tramline has caused such terrible traffic jams. After experiencing so much turbulence on her flight, Liz really had a hair across her ass by the time she landed.