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."