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Someone who is neither ugly, but not very good looking either.
Guy 1: Did you see that girl I pulled last night she was a clear 8/10.

Guy 2: No way man, she was a 6/10 a clear Inbetweener.
by SWAGNIFICANT August 17, 2011
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9
An inbetweener, as implied by the name is a male neither a boy nor a man,it is that perfect inbetween stage where looks are still pumping strong but nothing is yet wrinkled.
Also this stage allows for the awesomeness of a younger male with the maturity of a man.
An inbetweener is not fickle and wants to have fun.

Girls love the inbetweeners because they are the perfect combination.
He is the perfect inbetweener for me says sally to joy
by alone on a swing October 15, 2011
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10
n. A turd that has come halfway out, and you don't know whether to force it the rest of the way out or suck it back in.
"I sat down to crap, and all I had was an in-betweener, so I sucked it back in.
by waltermitty August 14, 2004
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Nobody could tell that Jordan was an inbetweener, despite the fact that she had a luxurious happy trail on her six pack, and that she's had pubes since she was in Kindergarten.
by Spatchmo December 23, 2009
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12
A kid/teen who isn't a sports jock, tough fucker or complete dosser but isn't a wimp or goody two shoes.
Inbetweener: What a jerk that guy is. Nicked my dinner money.

Inbetweener2: Lets nick this kid's dinner money to make up for it , he's a woose.
by Jacko1987 September 28, 2020
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13
A person who isn't super popular or with the "in crowd". But not a bottom scrubber with the losers at the bottom of the social pyramid
Mike, Dave, Liam, and Barry are not cool enough to be with the cool kids but not a bottom scrubber like the geeky anime/emo/gamer lot. They are the inbetweener people.
by Happy dinosaur May 09, 2019
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