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64.
Meaning your friend, mate. stems from the word blud.
"Oi blah chuck us that beer!"
von Oki3 22. Juli 2006
 
65.
A blah is a vagina. Queers and Australians (no relation between those too, of course. :p) typically refer to the vagina as a blah. When the word vagina is said quickly, it can sometimes be mistaken for the word blah.
Go stick it in your blah!

I told Brenton's mother to stick it in her blah, but she didn't hear me.

Last week, I got Stacy to take her pants off and show me her floppy blah. It was nasty.
von Atrex 18. Dezember 2005
 
66.
throwing up or puking
That sushi made me wanna go blah.
von chris 18. November 2002
 
67.
a word oftentime used out of sheer randomness, other times used to substitute for other words you don't want to say or really don't have a word for, can also mean dull or boring
"How was your day today?"
"It was very blah."
von bloodyangelz0 19. Dezember 2003