Define Bust Line Meaning

Bust Line
The line a guy says when we cums in a girls mouth.

My bust line last night was "HOWS MY SEMEN TASTE, B!TCH!"
By Marnie
Bust A Line

Amanda, dont tell anyone but i saw jen and martha bust a line in the bathroom!
By Perry
Busted Sewer Line
The act of a man pulling his penis out of another man or woman's butthole while that person simultaneously begins the defacation process.

I was doin' this chick in the butt, I pulled out and it was a total busted sewer line.
By Winnah