Definitions by jwc's

BACK BLAST

The left over remnants from someones shit that are blasted on the back of the toilet.

Hey Tom, Thad just back blasted all over the toilet!

BACK BLAST by jwc's July 19, 2006

up and under 

When someone takes a shit, and defys gravity and gets the shit up and under the toilet seat.

Damn, someone just did an up and under in the bathroom.

up and under by jwc's July 19, 2006