1 definition by I Can Ride A Mastodon

A variant of the term 'Whatever floats your boat'.
'Whatever piddles your fiddle' = 'Whatever pisses your instrument'
Jade and David are deep into conversation:

Jade: No, I don't want more kids!

David: Well, Whatever pisses your instrument.

Jade: .. What?

David: You heard me.

Jade: .. You be cray cray.
by I Can Ride A Mastodon March 13, 2010
Get the Whatever pisses your instrument. mug.