The thickness or circumference of an object or being.
This cylinder has a lot of girth.
The circumfrence of your cock.
"You know, I think girth matters more then length"
When your dick is partial chub and you grasp the lower shaft, forcing all the blood into the penal tip.
Tom: "Hey Gabe what did you do last night?"
Gabe: "Not much. My mom came in and caught me girthing though."
refers to the length around the shaft of the penis.
Yo, girl dude was girthy as hell, he stretched my walls past its limits.
1) to be full of girth
2) to have lots of fat pockets
3) more roundness than narrowness
That girls' ass is girthful. Man, you're getting girthful! How many dogs you been eatin'.