A day in which you do little other than eat crisps (usually doritos), watch television (usually 'Dave') and masturbate; i.e. a day in which you live as though you were claiming benefits.
Alright mate, Wubu2?

Nothing much mate, just had a Benefits day!
by Errrrrr12 May 2, 2011
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17th may is Friends with benefits day. Invite them to come over or go to their house and show them how much you crave sex with them. No excuses not to celebrate.
“I really want my soul to be fucked
“Of course you do. It’s friends with benefits day. Let’s celebrate.”
by heysishowareyou May 17, 2022
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