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You say this when you have no idea what to say similar to supercalifragilisticexplealidious
Billy did not know what to say to his crush so he said blagh and ran away.
by ola11 December 14, 2016
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the act of needing to make a vomit like noise after seeing an ugly face, an uncomfortable site, the combination of two people who shouldnt be together and how it makes you feel, and the noise girls make after eating and running to the bathroom.
1. Me and Jamie saw her and could not help but go "blagh"

2. The site of her in a bikini made me want to "blagh".

3. When I saw the couple walking together I wanted to "blagh".

4. After eating one potato chip she needed to run to the bathroom and "blagh".
by Karen BagO'Douche March 21, 2007
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total bullshit, a waste of time, something not worth hearing, a noise made when vomiting
"when we grew up all of this was nothing but blagh!"
by arthur lee johnston the X January 01, 2012
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Blagh is a word which has not really got a definition but some people think it is a different language such as Russian but really it's just a word that people like to use when they are not listening
"Blagh blagh blagh"
by JimBobAlfieJob February 08, 2018
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