From Longman Dictionary of Contemporary Englishat a rakish angleat a rakish angleDCif you wear a hat at a rakish angle, you do not wear it straight, and this makes you look relaxed and confident → rakish
Examples from the Corpus
at a rakish angle• A black, felt bowler sits on his head, tilted slightly forward at a rakish angle.• But some were written at rakish angles.• There was Philippa Mannering looking avid in a beautifully cut check suit and a brown beret at a rakish angle. 