
Don't ask me, a little ELF did it. Ha, ha.
The Big Bang Theory Season 6, Episode 6

...on a 6-inch figurine
of Legolas the Elf.
The Big Bang Theory Season 2, Episode 23

Not yours, mine, you punk-ass ELF.
The Big Bang Theory Season 6, Episode 6

What an ELF I would have made.
The Big Bang Theory Season 4, Episode 20

and left an ELF costume
in my locker.
The Big Bang Theory Season 5, Episode 11