In Season 1 there are frequent moderate crude sexual referances.

In Season 2 there are some moderate sex references to "pubic hair" and some other sex references occur throughout the series.

(TV-MA on DVD)

In season 1 there is one use of "fuck".

In season 2 there is one use of "fuck", which is bleeped out.

Some moderate/milder profanities occur throughout the series "dick" "bitch" "pussy" "ass" and some other milder language.

Frequent references to "smoking pot", two of the main characters own a "bong" and are frequently discussing how much they love "weed" and discuss getting "high" throughout episodes.