SlouchBack 

Verb: To use the SlouchBack as a tool during sex

I SlouchBacked both those twins from my dorm last night

SlouchBack by Former Freshman June 9, 2009

Slushback 

When a Canadian (snowback) and a mexican (wetback) make a baby, the baby becomes a slushback.

"So i was walking down the street and i saw this Canadian/Mexican baby and he looked like a slushback"

Slushback by Lewis and Hung January 2, 2009