Referring to the ass crack
Word derived from a
Person 1: Dude, have u ever seen her when she bends over????
Person 2: Thats the bottom line!!!
Person 1: Yah man, I hear you...but whatever you do, DON'T look down the bottom line. Last time I did, I noticed little fragments attached to the bottom line
Person 2: Man, that's nasty!!!!