1. A quicker way to say "Who the fuck is that?" or "Who's there?"
2. A sound of surprise and/or confusion
(originated by Bam Margera's father, Phil Margera, upon seeing alligators in his kitchen)
Friend 1: "I was talking to Jason Crisp the other day."
Friend 2: "Who da?"
1. To "have a go" at or on something.
2. To go somewhere/drive somewhere.
1. Let's have a blap on your motorbike, mush!
2. I'm gonna blap up the shop to get some growlers.
the action of fucking and humping together
Damn, I'd like to fump that ho all night long.