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 November 24, 2007
1 more definition
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