He used an arse-wash to clean himself.

Dealing with difficult customers can be a real pain in one's arse.

Arse-end Charlie is a derogatory term used to describe someone who is considered to be at the bottom or lowest rank in a group or organization.

He fell on his arse.

He likes to sit on his arse all day and do nothing.

He is sitting on his arse all day.

He sits on his arse all day and does nothing.

He sat on his arse all day.

She stirred the potion in the cauldron with a long wooden spoon.

He is known for being a tight-arsed businessman.