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adj.

A woman's naturally uplifted breast. Appear to be nice, round, and firm. They do not hang and have a perfect bounce.

Nothing less than a 'B' cup and no more than a 'D' cup.
Guy 1: Did you see Doris' tits?

Guy 2: Are you kidding me? They're perfect!

Guy 3: Safe to say, those are some "Gripnacks!"
Gripnacks by Christian E. August 16, 2008
Related Words

gimpacus 

Weird retard midget from the movie 300 that cant lift his shield and looks like my aunt who barks at me cause shes fucking crazy
Gimpacus you can be in my army if you can lift a shield
gimpacus by miguel cannuli April 7, 2007

grimacesque 

Containing the qualities or likeness of the Grimace. Generally used in describing fat guys in purple shirts.
Cory is the grimacesque looking guy who hangs out a middle school playgrounds with bottles of ether and an idle lime green van nearby.
grimacesque by thecrazyD November 3, 2007

Grimlocks 

This is the occurance of dreadlocks in the womans pubic region. They are often very thick, long and have a strong odor of foul-smelling vaginal discharge and wet dog. More often than not, there is slight hint of patchouli, in a failed attept to cover up the heinous stench.
I took this bitch out for some drinks, right. One thing led to another. I got my hand down her panties, and got stick. My rings got caught on her grimlocks. I was like, yo!
Grimlocks by Henry Bemis October 30, 2008

GrimaceShaker 

A dance that grimace does
Do the GrimaceShaker