Stiff-six 

An erect penis. "Stiff" refering to hard, and "six" referring to six inches.

I have a picture of your sister taking a stiff-six in the chops.

Stiff-six by SDW2311 April 15, 2005

Stiff Leg 

When a guy has a hard on and he can't straighten his leg without pain

"Man, why you walking so funny?"

"shit, i got stiff leg"

Stiff Leg by L.Perkins January 16, 2008

stiff panus 

A pretentious little motherfucker who likes to dress up as a scaly brown lizard.

He sucks, a lot... and takes it in the bum bum.

Ralph: Woah, John, that guy is taking it in the ass in public!
John: Yeah dude, that guy is SUCH a stiff panus.

stiff panus by TremulantRock December 5, 2004

stiff weave 

when someone uses old weave in there head to get there hair done ..

this girl in my class has very stiff weave

stiff weave by firefighter01 January 16, 2018

stiff-kash 

physical transofmation occuring while someone(primarily Akash) is stiff.

"You're making me stiff. You wouln't like me when im stiff"

stiff-kash by Lydia J Leon June 9, 2004

stiff spine 

a stiff spine is the act of ramming your penis so far up a girl's ass it acts as her spine.

i gave my girl a stiff spine
ouch...
was good for me so w/e

stiff spine by yedatsme August 13, 2010

Stiff Fuck 

Same meaning as 'stiff shit', but the word 'shit' is replaced by 'fuck'.

Steve: shit, we missed a bin

Shane: stiff fuck

Stiff Fuck by Mysta D February 21, 2011