As described in comedian Liz Feldman's stand-up routine, it's a skinny guy with a thick penis.
You would think he's small because he only weighs 100 pounds, but he's skinny thick.
by JazStarr May 27, 2010
1 more definition
a girl that is thick in all the right places (e.g., thighs, butt, breasts)
damn did you see that girl, she skinny thick
by EYS May 14, 2010