There are a few crude references sprinkled throughout the movie that are brief in nature and not dwelled upon.

Shrek is seen comedically naked "stripping" on a metal chain. Buttocks are seen but full frontal nudity is defused.

Skimpy outfits are worn by some characters.

One song talks about "getting head" from a chick.

Two uses of the word "f**k" (one use is partially obscured and the other use is not). Other milder terms like "ass", "hell", "slut", and "damn" are used infrequently.

Unlike the normal Shrek movie, this version has more surreal animation styles which may make some people uncomfortable.