The female version of a chach. Chachettes generally go for chaches and will do almost anything to impress them. Chachettes usually prowl college parties looking for the pong stars and shotgunners as they are usually the chachiest guys at the party.
Bro 1: "Dude did you meet that girl Shane at the party last night?"
Bro 2: "Yea man, she was such a Chachette"