A tool used by mechanics to "creep" beneath a vehicle in order to better work under it in a more comfortable position. It looks like a small platform with a cushion on top that has a wheel on each corner and sometimes low rails on the sides so you can carry it around.

John wanted to work on his car's axle, so he laid down on a creeper to keep off the floor.

A strain of marijuana that circulated for some time during the mid 1980's. Generally thought to have been hydroponically grown, it was so-called because of its tendency to not produce large headrushes during the act of smoking, the high instead "creeping" up on you 10-15 minutes later. Sometimes referred to as "creeperweed."

A green penis like creature in the video game Minecraft that gains pleasure out of destroying hours worth of building by self destructing. Before it explodes it let's out a "sssssSSS" noise that resembles a fuse being lit.

In other words if you hear "ssssSSS" Run like fuck.

Creeper: "That'sss a nice houssssse you got there. It would be a sssssshame if something happened to it. ssssssssssSSSSSS