Colon Tickle

Verb- The action of inserting the penis into the anus for the first time, invoking mostly pain, horror and complete shock. Possibly followed by pleasure. Possibly not.

Other definitions include...

"Maiden Voyage on the Chocolate Train to Khe Sanh"

"Just the tip, for boys"

"Backdoor Pony Express"

"Hey, did you hear that Vin Diesel wanted to Colon Tickle Clay Aiken?"
"No way! He doesn't seem like his type at all!"