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1.
Blirt is a birkenhead slang term for semen.
Usuaully, it is used in the ED form I.E blirted
I was just about to blirt and my mum walked in
I blirted in some chicks mouth
I blirted all over my sheets
I blirted up my GF's pussy
by Joazza August 15, 2007
 
2.
Balcony Flirting. Flirting with a hottie on the balcony opposite.
Oh, look there's those fit Spanish guys on their balcony again? Lets get our blirt on!
by Funk & Skank July 02, 2013