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1.
A group of douches, three or more, that move, behave, drink and act as one big douche. Usually found in clubs, bars and sporting events.
Bar patron 1: "We need to move bars dude. those guys over there are all wearing Tapout tees, white hats and have chinstrap beards."

Bar patron 2: "Yep that's a Douchetroupe in it's natural environment. We don't have a chance if they start ordering shots, yelling at the TV and shouting at women in the bar."

Bar patron 1 and 2 leave
by LeprechaunOD March 01, 2011
 
2.
A group made up of individual douche bag people
Look at that douche troupe with their popped collars
by bootstraps45 January 29, 2012