Half-Sammy 

a half a boner. usually enough to hide in pants but makes hugs and walking around in boxers awkward.

dude, i woke up with a half-sammy and my mom saw it.

Half-Sammy by Dreadgazebo April 12, 2011

half-a-dyke 

A bi woman who leans more towards women than men

She's been with 1 guy and 4 girls - she's half-a-dyke.

half-a-dyke by lilabit July 11, 2011

half-grown idiot 

A way to insult an exceptionally stupid and naive person; meant to imply that they have not yet graduated to being a full-grown idiot.

Early to mid 1900's colloquialism from south-central rural Pennsylvania.

Boy, I'll tell ya'... that Bob Johnson down the street must be some kinda' half-grown idiot!

half-grown idiot by GoodWord July 25, 2011

Half-jaked

Partially drunk, the stage between tipsy and sozzled. Still able to function but may not make wise decisions.

A: Did you give that munter your number last night?

B: Aye man, a wiz half-jaked.

Half-jaked by Alibali September 4, 2013

half pillar 

When a boner is only halfway up, while the other half is still flacid

"I randomly got a half pillar last night"

"Thats a bummer"

half pillar by Mr. Half Pillar December 10, 2013

Half Thong 

A loop of elastic & spandex fabric that wraps around one hip, between buttocks, and covers your junk. The loop can also be longer and go over one shoulder instead of the hip. Essentially a Half-Mankini (A Half Body Thong). A backless version of the Half Body Thong would be the Junk Sling; a pouch for one’s Junk and an elastic or cording drawstring over the neck.

Only a few guys can feel comfortable wearing a half thong to the beach.

Half Thong by I'm a guy and I wear Speeods October 9, 2014

Half-nighter 

Like an allnighter, but only halfway

Generic Douchecanoe: "Ey man why werent you at the party last night"

Generic Student: "I was doing a half-nighter"

Half-nighter by AMajesticPotato December 7, 2014