The mayonnaise packet is a sexual activity in which someone cream-pies someone and then proceeds to ground-pound their abdomen causing the "mayonnaise" to come out of the packet.
I did the mayonnaise packet with my partner! It was a very intimate experience!
by Squeem puncher August 7, 2021
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When a girl asks, during sex, to receive the man's load on her, after the man has (or is currently) cumming into a condom, but not wanting to disappoint, the man distracts the girl and squeezes the contents of the now soiled condom onto the girl.
"Dude.. i can't believe you gave her a mayonnaise-packeting last night!!!"
by D. "Sha Nay Nay" Footle July 28, 2007
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