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1.
'glarl' is the noise arnie makes when he is really puttin effort into his fighting, it is also the expression he uses when he is going through pain and personal anguish
how to pronounce 'glarl' - GL-ARLL-LL
by Gaz#40 August 31, 2006
 
2.
GLARL Good luck at real life - something often said to nerds who get overly excited about killing someone on a videogame mostly over xbox live.
Nerd: HAHAH YOU GOT PWNED IN THE FACE

Regular dude: its just a game dude but GLARL
by Regular Gamer November 29, 2009