Colombian Surprise 

When someone takes a dump on top of the toilet lid, leaving a surprise for the next person.
Originated in Colombia.

My girlfriend left me a Colombian Surprise this morning! I made her clean it up.

Colombian Surprise by Dominguez 396 November 30, 2013

Columbian Surprise 

When you cum on a girl's arm in a line and make her snort it.

Dude, I gave Jenny a columbian surprise last night and it's still up in her nose!

Columbian Surprise by Deliworkers December 18, 2008