If looks could kill you would be an uzi
You're a shotgun - bang! What's up with that thang
I wanna know how does it hang

from Salt 'n' Pepa – Shoop Lyrics on Rap Genius

Meaning

Instead of using a 1 to 10 scale to compare how handsome you are, she uses a “firepower” scale. With a rate of fire of 600 rounds/min, I guess it’s a pretty good compliment.

On a side note, American dad used those lines in one of their episodes:

http://www.youtube.com/watch?v=k9PS7S8cln8

To help improve the meaning of these lyrics, visit “Shoop” by Salt 'n' Pepa Lyrics and leave a comment on the lyrics box