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A really sexy man over the age of 40. Even teens want to be with them.
Man, Did you see Johny Depp's latest movie?

Oh ya! He is SUCH a merf!

>> Dang that george cloney is one merf!
merf by babababakbakbka May 13, 2008
noun: any word, topic or object which would score very high on the merf scale
I don't know why it took Bob so long to figure out why "foot long hot dogs" are a total merf.
merf by jhimm April 16, 2004
1.Term of endearment used to humiliate a partner in public.
2.Also used as random blathering by confused female companions.
"I love you, Merf!"
or may be used with other terms:
"You are my Sugar Merf."
"oh, Merfer!"
merf by Marklaria September 25, 2005
a substitute for the word cool, since it kinda gets old after a while.
Man, that bitch was so fucking merf in bed. hot damn.
merf by Richard Heymann April 19, 2006
Origin: as a mistyped word using T9 texting.

1. Slang for nerd, or geek.

2. Something which either is nerdy or geeky or exhibits nerdy or geeky qualities (WoW, Pokemon, anything you can be a fan of basically)

3. An insult for someone who is even worse than a nerd.
Only merfs like (insert geeky/nerdy/lame/otaku/weird thing here). Freaking merf...
kelly: MERF!!!
Ali: wow kelly. you're gross.
merf by AliFabulousShe May 3, 2008