'Chewies' refers to the action of a female (whore, slag, bitch, ho) performing oral sex on a male.
Women are often required to perform what is referred to as a 'round of chewies' which is quintessentially 3 separate acts within a short amount of time.
(Chewies can also be used to refer to a woman receiving oral sex)
Niggaz startin to know my face so I had to cut my hair"
"I smoke chewy like a muthafuckin' nut
ya got a gram bag get the zags an' roll 'er up"
Andre Nickatina (coke fiend, great rapper)
2. A fully shaved vagina that tastes so good that you almost feel the urge to chew on it.
"That blunt made my dick shrivel up,, was that a chewy??!!"
"Howd you get that black eye"
"I got kicked in the face when I bit Marissa's chewy"