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1.
The little fella you see at the gym who tries to draw attention away from his short stature by packing on excessive muscle mass (this generally has an effect opposite of that which was intended). Often waddles around like a muscly lil' meatball.
That manlet may only be 5'5", but I just saw him rep 250 lbs. eight times on the bench! Somebody's overcompensating.
 
2.
A korean girl who has the figure of an above average built man, they are normally characterized by their hunchback, wide broad shoulders, red mullet and need to latch onto other males. Ankle grabbing behaviour is also common as well as an extreme thirst for drugs. The term "Jin Ha" or "Jin Hard" is commonly associated with the term manlet.
"Help! I just got ankle grabbed by Jin Ha, I can't throw her off because she's too much of a manlet."
by Jin Ha January 20, 2014
 
3.
a little man - (of which guy nakamura is a good example -

see- guy the fly or shiznit for more info.

a term that can be used to annoy, but in some cases, just to point out an obvious statement
'guy is a manlet, haha, he is so small lol !!11!!1!!1!!! !111oneoneeleven!!11!!onehundred!!1 !11!!eleven!
by weeabix April 26, 2005
 
4.
5'7" or smaller. Usually have Napoleonic syndrome.
That 5'5" manlet over their is trying to score with that score, but he is far too short to be taken seriousily. lolz
by Misc1111 October 24, 2007
 
5.
A vertically inferior specimen. Often characterized by a childhood void of carnival rides, dunks, and pussy.

Derived from the poem The Manley, by Lewis Carroll
http://www.poetry-archive.com/c/the_manlet.html
Bro 1: Did you see that bra get his shit stuffed in the 4th quarter!?

Bro 2: Chyea Bra, I dun even know why he still plays. Dude's such a manlet.


Bro 1: Look at the Manlet hitting on that cougar!

Bro 2: She can take him home in her car seat!
by Spicybeef July 21, 2008
 
6.
a small man who has to use lines such as "Hi you are really beautiful and I would like to have sex with your ankles, can we do it please?" to get laid.

It has also been reported that manlets can die from eating a manwich. Their body cannot hand this amount of manly meat.
A man who is below 5'5" is a manlet. They even resemble a chode.
by A New Era April 10, 2007
 
7.
Any guy under 6'.
Girl A: ,, Will you date that guy Jack?"
Girl B: ,, Hahaha no, he's 5'11 manlet , even 10 yr olds are this tall nowadays"
Girl A: ,, You are right hahaha"
by anon2236 April 05, 2013