Meaning your friend, mate. stems from the word blud.
"Oi blah chuck us that beer!"
بواسطة Oki3 يوليو/تمُّوز 22, 2006
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.
بواسطة Atrex ديسمبر/كانون الأَوّل 18, 2005
throwing up or puking
That sushi made me wanna go blah.
بواسطة chris نوفمبر/تشرين الثّاني 18, 2002
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."
بواسطة bloodyangelz0 ديسمبر/كانون الأَوّل 19, 2003
that time of month. the feeling a woman has when she starts her period and has no energy.
Amy: Sarah, you want to go horseback riding?
Sarah: No thanks Amy, I've got the blahs..

Amy: Oh.... Gottcha
بواسطة blah فبراير/شباط 19, 2015
When words fail, Blah speaks.
Teacher: Whats the answer to number 5, Matt.
Matt: Blah

Teacher is writing on the board in math class, room is filled with silence. Because words have failed the young students, a lone peer named Keith states the immortal term aloud "Blah!!"
بواسطة Patrick Hampton يناير/كانون الثّاني 26, 2015
رسائل يومية مجانية

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