Someone who looks like or has a fifteen inch penis (or just a big dick in general).
by pollotropical February 25, 2023
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A warning given to a person at fifteen minutes, then five minutes, before you are due to do a task or go out.
Her: "We're going round my mum's soon".

Him: "Can you give me a fifteen and five?"

Her: "It's time to go out and you're not ready!"

Him: "You didn't give me a fifteen and five!"

Boss: "We've got a meeting later. Don't worry - I'll give you a fifteen and five."
by The WeirdnessSymposium April 19, 2009
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The act of fornicating in a coffee shop when exactly Two US Marine Corps veterans are present and a nun is there to bless the ceremony. Whipped cream optional.
Me and my girl totally did a number fifteen at Starbucks today. Yolo.
by Pseudonammeelolz September 13, 2013
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A huge party for a girl at 15 to celebrate growing up. Similar to Latin American Quinceanera or the Sweet 16 party common in the USA.
She decided to have a Fab Fifteen instead of a Sweet Sixteen.
by claraCooper July 21, 2011
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a compiled list of fifteen of the hottest freshmen in a college or university. usually contains at least one transsexual
dude 1: damn, i just saw number 7 on the freshmen fifteen, shes smoking!
dude 2: you dumbass shes a transsexual
dude 1: oh SHIT
by lolcow4342 November 1, 2009
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