Humping with some of your clothes on.
Boy: Please, can we have sex?
Girl: I didnt bring a condom, let's just do some ass hugging.
Boy: You wearing a thong?
Girl: It wouldn't be ass hugging with it.
inserting your left butt cheek into your buddies right butt cheek there for forming a manly ass sandwitch
oh man lets get some ass hugging goin on