Cachi is a derogatory term used to refer to douchebags and fratboys and certain
bars or establishments where they might be found. Believed to have come from the
character in Joanie Loves Cachi, the Happy Days
spin-off. Girls of this variety are referred to as Joanies.
Some uses of this might include: "I
don't like going to
Jim's house because all his friends are so Cachi". Or it may be shortened to: " I
don't hang out at those Cach bars downtown. They're so lame."