lujka

Sub.

crazy as a loon; nutcase; headfuck (I'm not inviting my sister's boyfriend, he's a headfuck and he'd ruin the party — Neću da pozovem sestrinog dečka, on je lujka i pokvariće zabavu); loon (= lunatic); loony (od 'lunatic'); nutjob

umg.

fruitcake; space cadet