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8.
The act of having sex with a female, then after you cum you lay on top of her, shit on her stomach. Then you take your hand and slap her stomach has hard as you can. it is in regards to the imfamous comedian who used to smash fruit with hammers which then splattered all over the audience.
I shit all over that chick and then did a Gallagher all over her room.
by tj spaulding May 30, 2009
30 64
 
1.
Guy who bangs your girlfriend.
Dude, I saw your girlfriend with a Gallagher last night
by Spartan17 October 20, 2005
265 110
 
2.
1. extremely nice guy; sensitive

2. horndog; eager for sexual intercourse

3. amazing in bed; hot

4. extremely hilarious; will make anyone laugh
That really nice horndog is a gallagher.
by gallagher14 February 20, 2009
131 60
 
3.
After ejaculating on a girls buttocks, the man takes his penis, and much like a hammer to a watermelon, uses the head of his penis to splatter his own pool of semen all over her.
Getting inspiration from the prop comic, Ted decided to give his girlfriend a gallagher, unknowingly hitting her cat who was in the splash zone.
by ComediaAGoGo August 03, 2010
61 33
 
4.
Very large eyebrows, like Peter Gallagher.
Man! Look at the Gallaghers on that dude!
by tignor December 30, 2011
6 1
 
5.
Noun: A very large penis.
Man have you seen Tim's Gallagher.
by The7theleven December 22, 2011
21 17
 
6.
Gallagher; verb ; When your girlfriend is giving you head, suddenly grab the back of her skull and jam your dick down her throat.. This is usually used when she has been being a bitch or just needs to be put in her place.
My girlfriend was complaining how our relationship is all about me, so while she was blowing me, i gallaghered the bitch.
by makesgoodwordsman August 01, 2010
34 36
 
7.
(n.) a person or thing that acts in a manner such as imposing odd characteristics. Not normal.
"gallagher" a person saying odd comments like gub gub incessantly
by Dr. Jason Smith Ph.D UAP February 22, 2011
12 24