whifferdil 

an extremely offensive and insulting term used on anyone acting like an idiot. this term is so insulting that the only proper response would be a swift two finger surprise.

origin: unknown; but entirely unrelated to the aviation term.

Pando stop being such a fuckin whifferdil.

whifferdil by Ümbra May 26, 2004

Wifferdick

Verb; an intense sexual act!

A word that indicates that something bad will or has

happened. Another way of saying screwed "that guy just

got wifferdicked"

Another word for u-turn

Crap! Missed my turn, I will just make a quick Wifferdick!

I will blow her mind tonight with my Wifferdick.

Wifferdick by Bluntbeauty July 7, 2015

wifferdill 

To do a u-turn or some other extreme change of direction

Dude, we are lost. Do a wifferdill and let's get back on the main highway!

wifferdill by bezel333 December 31, 2005