This occurance is the prolapse of a rectum, the process in which the colon falls out the anus, as someone is eating out the butt. The prolasped colon, in turn 'suprises' the person giving the 'anal oral'.
I was licking this girls butt, and then I got a cookie monster suprise. It was so gross.
by Jon the Dude January 20, 2006
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.Buy the mug