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1.
A shower taken while drinking one or multiple beers. Has the same relaxing effect of drinking in a hot tub. There are different levels of happy showers. A regular one includes one beer, a double happy shower entails the drinking of two beers, triple with three, and so on. A super happy shower includes any of the above but while also receiving a blowjob.
Dude #1: Bro you're sweaty as all hell. Did you just work out? You need a shower.

Dude #2: Yeah, man, toss me a couple beers, I'm gonna make it a happy shower.

Dude #1: Where's your girlfriend at? Tell her to give you a blowjob and you can make it a super happy shower.
by Dweebos Maximus March 18, 2009
31 14
 
2.
A shower that consists of masturbating and quick cleansing of the penis after the act has taken place.
"Fancy a wank.. brb off for a happy shower."
by Mr. Donlon April 13, 2012
1 2