Major Deegan

noun: Severe diarrhea (aka major D).

Man, I just had some Taco Bell, now I've got to hop on the Major Deegan.

by James-NYC December 26, 2007

major deegan

In this act, the male (or female, if she has a strap-on) is doing his partner in the butt. He then pulls out, and proceeds to take a crap in his partner's butthole.

"My girl was being a total bitch, so I gave her the biggest Major Deegan, and then got the hell outta there"

by Bets July 28, 2006