Slippery Nickel 

The act of changeing sexual positions without takeing your penis out. Sometimes refered to as the Manhatten Transfer.

Lisa went from doggy-style to reverse cowgirl without removeing Jed's dick and successfully completed the slippery nickel

Slippery Nickel by Sticky3030 February 6, 2010

Slippery Nickel 

When a nickel is soaked in a combination of sperm and urine and the nickel is then put into everyones mouth and swallowed

It was so crazy i actually wanted to do a slippery nickel

Slippery Nickel by Hornyforhire August 2, 2010