A dictionary of slang - "Trump" - English slang and colloquialisms of the UK.

trump Verb. To break wind from the anus, to 'fart'. E.g."There's a disgusting smell in here. Has someone trumped?"
Noun. 1. An act of breaking wind.
2. The resulting smell of having broke wind from the anus, a 'fart'.

via peevish.co.uk

I think we need to bring this slang over to the US.