A sexual act where a guy blasts a girl in the face with his load of cum while going "bahahahaha".
Justin: "I'm so going to give that girl, Allison, a Baja Blast later."
Nate: "The drink?"
Justin: "Nah, dude. The kind that you give with deeeeezzzz nuuuuutttttssss."
Person one: "Hey is that Baja Blast?" Person two: "Yeah why?" Person one: "Because I wanted to know if I could have a sip?" Person two: "Sure, but a small one." Person one: "Thanks, man." *chugs whole can* Person one: "Here." Person two: "Thanks." "tries to take a sip" Person two: "AW, FUCK YOU!"