So there is a girl who shows her stomach but other then that there is no sex or nudity

There are some mild innuendos

Sometimes there is kissing and references to you know what but nothing that wouldn't go over a kid's head.

One character is shown in a port-a-potty reading what seems to be a playboy magazine but since this is a kids show, the magazine is not graphic and the man has no visible genitalia.

A crossdressing old man uses apis (the show's equivalant of apples) as fake breasts which fall out in one scene.

Frequent bloodless, fantasy, and slapstick violence throughout the series. Nothing too graphic.

Uses of Shut up, Suck, Stupid, Idiot, jerk, and brat. And 3+ uses of hell.

Ruel sticks up the pinky finger in one episode.

One character calls a story "drunken".

Like, what one reference to beer or something? There are cups ( I can't remember the name) That look like they are for beer, but the show does not show anything.