Term used to describe fan-fabricated homosexual relations between the soldier and the engineer characters from a game called Team Fortress 2.
That soldier may be an annoying, anal attaboy, but he throws a fiiine helmet party.
by KGBigelow May 24, 2011
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A party where there are only guys in attendance
Where are all the chicks? This is a total helmet party.
by Tubby John June 22, 2006
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A gathering or party where attendance is mostly, if not all, dudes.
we can either go to Ted's helmet party or go out and troll for chicks.
by kejo66 September 19, 2007
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A party or other gathering where there are too many guys compared to girls; or virtually nothing but males in attendance.
Let's split man... this is nothing but a shiny helmet party!
by Pdubya64 June 13, 2010
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Getting ready for a serious night of partying, that includes drinking, smoking pot, and perhaps a random sexual encounter.
"Hey J.J., do you have your party helmet on tonight?"

"Hell ya, Dominic, I'm ready to go."
by pinchypants March 18, 2006
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