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noun: the greatest action flick ever. No hesitation, never surrender, no man left behind. From the "Thunder Gun Express" episode of "Always Sunny in Philadelphia"

verb: used in a variety of ways, but mainly to denote overcoming an obstacle, to win, or be triumphant.
1. We need to hurry up, Thunder Gun, the greatest action flick ever, starts in five minutes and we might miss it!

2. "We're never gonna make it, we're stuck in traffic"
"Just Thunder Gun the curb!"
by SkeetSkeeter December 19, 2011
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3
When a male is having intercourse and has a sexual climax so powerful that their partner flies across the room, covered in cum.
Trey: So how was your night with Marissa last night?
You: It was awesome! I was so sexually excited that I accidentally gave her a Thundergun. It actually broke 2 of her bones.
by Descapito 6 Confirmed! June 16, 2018
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4
V. When two or more persons are together, one person preforms a "Butt Chug" and the other party lowers him/herself to receive the alcoholic rectal discharge orally. Before preforming the "Thunder Gun" one person must proclaim "THUNDER GUN!!!!" very loudly to find a willing participant and the first person to scream " AAAAYOOOO" will be the honored recipient of said Thunder Gun
Ethan: Damn I'm thirsty
Joe: THUNDER GUN!!!!!
Zach: AAAAYOOOOO
......
Ethan: Damn I really wanted that thunder gun :(
by THE_Thundergunster69 July 09, 2011
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5
Best gun on nazi zombies. Kills a large amount of zombies at 1 time. Is a 1 shot kill for the whole entire game. (and to other idiots that say that it ends up being a 2 shot kill, get a rape train started, get at close range. Its a 1 shot at 15ft down) If you want to get to round 30+, use this gun.
thunder gun
by mrlowe98 May 18, 2011
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