åfäuln

Bavarian

åfäuln (past participle ågfäult) (East Central Bavarian, chiefly Vienna)

(transitive, figuratively) to snap at someone
Heast, fäul mi net å! ― Hey, don't snap at me!
(transitive, figuratively) to suck, to piss someone off
Heast, des fäult mi so å! ― Oh man, this pisses me off!