Pitterflys 

When you have butterflys in the pit of your stomach.
Pit/(Bottom) of your stomach + Butterflys = Pitterflys

Im really nervous. I must have pitterflys.

Pitterflys by Horseygilr99 March 17, 2010

Putterfly 

A standard, large-faced black putter that becomes a butterfly when under the influence of funny-smelling cigarettes. These putterflies are worth large bounties if caught and paid in Karograms.

You let her escape! You let the putterfly escape!

Putterfly by R. J. Williams June 23, 2008