When you feel the need to express a greeting with a "Blam
yo" or
alternative comment with a "Blam in yo
face" used to enhance a mockery of someone or a shameful comment.
You bust through a door into a party or gig and you shout "Blam
yo" and now you are known to be present!!
You caught you best
mate shaggin your Girl
Friend... thats a major "Blam in yo Face"
Commonly used in da Dirty Souf Syde by DnB or Hip Hop musicians and fans.