Procure por qualquer palavra, como thot:
 
1.
Spazzy sheepy noise that you do when you're hyper or something retarded or funny or annoying just happened

Sophie - Can i eat those sweets?
Sophie's mum - No, they're for tonight..
Sophie - Mehhh *waves arms around weirdly*
por yapdizap 04 de Abril de 2009
 
2.
when something really retarded has happened and one does not know how to express ones feelings towards it.

it is usually accompagnied by a hand gesture:
.put index finger under nose
.as soon as you say the word make as if you have a VERY STIFF moustache sticking out from under your nose in a thrusting motion with said finger
. alternatively, malke it that the imaginary moustache is curled at the end

The reason for this hand gesture: this is when you have become so retarded that you need to be sent to a insane asylum and your nostril hair start growing and/or curling
Zippy: *trips up the stairs*
Gemma + Roadie: MEHHH!!!!
__
Gemma: *walks into a chair and APOLOGISES*
Zippy + roadie: *discreetly* mehhh

por Grrrr! 24 de Agosto de 2007