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"
The female version of a chach. Chachettes can typically be found playing tennis, sunbathing at resorts, or doing whatever else they can to attract their male counterparts; chachs.
Bro 1: "Hey man did you see that girl Shane at the party last night?"
Bro 2: "Yea mane, she was kind of cute, but way too much of a chachette for me."
Bro 1: "I hear you, let's leave her for the chaches to deal with."