nacftm 

Not A Conversation For This Medium. Used when a conversation takes a turn that makes continuing it in the current medium innappropriate.

via IM

A: Wait, you didn't invite Janet? Why?
B: NACFTM

nacftm by Jay Pfaffman September 9, 2008

nacktmull 

Completely hairless and blind creature which lives underneath the earth surface. Especially known for its marvellous skin which is similar to a baby`s behind and can be high quality leather for rain coats.
Also look up Axolotl and Grottenolm

"Thats an awesome Nacktmull jacket you got there!"

nacktmull by birra_morena April 26, 2005

Nachtmare

A nightmare so bad that it's in German.

Yesterday i dreamed i found myself on a deserted island with Tom Cruise, it was a complete nachtmare!

Nachtmare by xrayspex1984 August 14, 2010

Nachtmahr

Nachtmahr is a Demon who Fucks your Brain up at Night! Dreaming Bad? A Nachtmahr was in your Bed!

A Nachtmahr hunted me in my Dreams! Nachtmahr stolen my Lolipop...

Nachtmahr by Nachtmahr April 7, 2010