Pronounced : "chawch" An event such as a house party, a night club, or local bar where there is a much more significant amount of guys (chaches) rather than girls.
"Dude, let's leave. It's a god damn chach party. "
When the 19 year old sexy nanny from house poor Iowa shows up and is in your house taking care of the kids and you day dream of the nanny bending over too far
O fuck i finally ate the nanny chach and yumm