Apparently Chris Brown's way of referring to his dick.
"aint no particular one that's getting the water gun, so many that i want"
by token asian girl February 21, 2008
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The definition of the phrase water gun is the male organ associated with intercourse.
Put your water gun on safety, it's firing all over everybody.
Your mother wont be impressed.
by Gerdunga February 6, 2008
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Any type of syringe used to inject drugs intravenously.
We locked ourselves in the bathroom and squirted each other with my water gun then i grudged her ass for like eight hours.
by The Water Gun Tweaker December 26, 2005
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when u drink a glass of warm water and then go down on a chick then squirt the water up her vagina
See douching/ biday for examples of water gunning
by taylor joes January 17, 2011
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Defines somebody or something that doesn't impress, ore is even under the banality level.
"This weed is such a water gun...where'd you get this!?"

"- How was the game?
- Water gun...next time I'm staying home..."

"- Did u see that stripper??
- Water gun..... check out the one on the bar! "
by Papoc August 9, 2009
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When a man ejaculates into a woman's mouth and she squirts it back at in through her teeth
"the kids have been out Water Gunning all day."
by Human Palmtree February 2, 2020
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A term used to describe the lack of muscles in one's arm.

Derived from the word "gun" which is commonly used to describe a very muscular arm.
by Im a Bad Billy. June 26, 2011
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