Ass to mouth ATM. Riotous and somewhat disgusting behaviour among close friends and loved ones.
Evolved from Tea bagging
My poor mate rossclot was 'bummed in the gob' by my other mate stu, whilst the chap slept.
This involes the former removing his trousers and placing his anus upon the latters nose. Highly amusing and dangerous if the said victim arouses from a state of unconsiousness.