Sin Shower 

Not referring to an actual shower, "Sin Shower" is actually a term of endearment used for friend rituals. Such as when everyone is drunk as fuck or some idiots decide to hot box a tent their friend's parents need to use the next day.

Person A: "Dude, what happened yesterday?"
Person B: "It was one hell of a Sin Shower"

OR

Person A: "You know... I love you guys" *cries like a little bitch*
Person B: "Friends that Sin Shower together, stay together"
Karl: "Wtf is a Sin Shower"
Person B: "STFU KARL"

Sin Shower by GROOnpa January 12, 2022

sinshower 

Something so bad, it's good.

Kelly Lynch is like a sinshower in the middle of the day.

or

I just ate an entire sinshower's worth of french fries even though I'm on the Atkins diet.

sinshower by Chugglehead September 25, 2009

sunshower 

To urinate all over your partner after engaging in sexual activities; usually done in European countries.

Rob gave Tim a sunshower last night. I could hear it through the wall..

sunshower by Riive March 20, 2011