My dad, entirely innocently (according to him) went looking for some new, larger water butts for their new house and went straight to Google for "large butts".

I think he knew what he was doing.

Also know as a water butt...

Good thing people in the UK already know that term, since it sounds like the kind of thing they'd need to upload their ID to look up online.

A butt you "make it rain" on

A butt where you put your rain, duh.