Rhyming slang for "Definately" or "Defo" for short. It comes from the name of the England football player, Jermaine Defoe. This is because of his second name sounding like the word "defo."
Wow that Amanda Holden is a M.I.L.F

Jermaine

Oh and btw, are you coming to play fotball on saturday

Jermaine mate
by xndrh1 May 17, 2010
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A person used to make up a sexual threesome. also see fuck buddy, Ashley Cole, Spit roast

The name used by professional footballers when checking into a Travel Inns and simular hotels to have group sex with each other.

Anon: " The battery on my mobiles gone flat, can I borrow yours Jermaine? "
Jermaine: " Yeah its next to the ky Ashley "

Anon: " Fucking hell Jermaine you've got spunk in my eye again don't you realise how much it stings "
Jermaine: " sorry Ashley "
by Rob St Evenage March 6, 2008
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A complete dickhead sometimes. Heartbreaker too, but got the looks. Doesn't matter whether the man has a small or large one. He knows his way.
by The Jem. August 23, 2021
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To be used as a substitute for the word 'definitely'.

Derived from the pint-sized footballing upstart that is Jermaine Defoe.

Jermaine Defoe..........Defo............Definitely
"Hey Oli, do you fancy going down to Infernos tonight and picking up some slags?"

"Jermaine"
by The A-Rod August 3, 2009
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Of german decent. Jermaine is a name used for great soccer players.
Jermaine and Santiango from the movie goal, play soccer.
by Dude07 March 10, 2007
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Underrated af, the guy who has split personalities, and is WAY different when you meet him in person than online. Funny , but also mean in a joking way. He brings up random stuff at random times in parties and conversations. Jermain is a guy to leave you when he wants to, but in reason that he can’t express. Jermain is either short or tall nothing in between.
Holy sh*t where did Jermain go, oh there he is!”
by Harlow Wellington November 24, 2021
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Jermain can be used as a singular noun for a legendary or at times classendary person. The noun Jermain is derived from the Spurs player Jermain Defo. Jermain is used to refer to people in the singular only, it is not a collective noun.
Example

"How many Jermains are going down the pub tonight?"
by J David Jerome October 3, 2006
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