1. the act of smoking freebased cocaine (crack) while climaxing from engaging in oral sex.
2. the act of blowing the vaporized fumes of inhaled crack cocaine into or onto the genetailia of ones partner(s).
1. I gave Eddie a master blast after he cooked up an eight ball and then we fucked like pigs.
2. Eddie and I were doing a master blast when he inadvertantly came in my mouth and i swallowed it.