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1.
The strenuous task of spraying oneself with Febreze in lieu of taking an actual shower.
"Mmm baby you smell so good."

"Thanks, I just took a frat shower. Lavender."
by RelapseSAE May 29, 2011
 
2.
The act of drinking beer while taking a shower. The ultimate multitask.
I was running late for the pregame so I took a frat shower.
by Tyler Forbes Mason December 03, 2010