look up any word, like bootylicious:
1. Guck
To hardcore fuck, usually in your moms ass.
Ey yo nigga, I gucked that dudes mom so hard!
2. guck
to post nude pictures of your ex girlfriend on their own website.
The guys from Urban Dictionary need to guck Sharon Turner.
3. guck
When you do a typo. For exemple, when you want to write fuck but you do a typo and write guck. Because of this typo (that I make regularely) you call any typo a guck.
(chatting on MSN)

person 1: sorry... but i cant make it to your party

person 2: (very frustrated) what the guck!!!!!!!!

person 1: guck?????

person 2: fuck* sry bout that

person 1: dnt worry bout it bud i guck a lot 2

person 1: dont* lol
4. guck
A wet stinky mushy turd that peeks out of the water in the toilet bowl (mostly dark in color)
He had to make a guck before his shower.
5. Guck
The fatty layer that protrudes between a man's lower abdomen and upper genital area. This abnormal physical trait is usually found in obese men, regardless of age or race.

The male derivative of the word Gunt.

Short form for cock-gut.

Gut + Cock = Guck.

Also known as a Gick.
Most fat guy's cocks look smaller because they have a guck.

I can't properly measure my cock because my guck is in the way.

Luciano Pavarotti and B.B. King have big gucks.
by Chib Chakan Sep 16, 2005 add a video
rss and gcal