Nickel nap 

Taking a quick nap with a nickel in your hand. As soon as you drop the nickel on the floor you wake up and go on with your day

I’m so tired but i don’t got time to rest, a nickel nap might do the trick.

Nickel nap by The Spreller November 13, 2023

nickeltapping 

A prank used to scare people. Stick a nickel to one of the sticky strips on a Band-aid and attach fishing wire to it. Stick the other band-aid strip to someone's window, and draw out the fishing line to a hideout car. You can then pull on the fishing line to make the nickel hit the glass, which sounds like someone tapping on the window. Best used on homes of neurotic old ladies.

We went nickeltapping on old lady Rawlins last night. It was hilarious because she was nearly crying and almost called the cops.

nickeltapping by DeceitfulFish March 29, 2009