Definitions by ZACH and alex

lava butt 

In the sercumstance when ones fart is so hot it feels as though lava is oozing out the ass.

Known to leave a hint of sulfer in the air.

OMG!!! my ass ring is so hot and I smell sulfer, I swear theres lava in my pants...ow..I must have lava butt.

lava butt by ZACH and alex October 7, 2005