the buttocks, particularly in a vulgar or informal context

one who is foolish or annoying

बेवकूफ

English Usage: Don't be such an arse, just listen to the instructions!

Hindi Usage: ऐसे बेवकूफ मत बनो, बस निर्देश सुनो!

to bother or annoy someone

परेशान करना

English Usage: Stop arsing about and get to work!

Hindi Usage: लफड़ा मत करो और काम पर लग जाओ!