Definitions by ZOMG-7G7-GMOZ

Night Cappin Elf 

A elf that hides under your mattress and puts on your night cap when you are asleep, at exactly 11:59 and 32.5 seconds

My night cappin elf put my night cap on for me when i was asleep and has the name of steve.

Night Cappin Elf by ZOMG-7G7-GMOZ April 5, 2010