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3.
when you were skating your favorite spot in town , then u fall catch your self with your elbow.. later its a huge ass bump that hurts
(kick flips 10 set lands but falls on impact) fuck bro AHHHH i got a swellbow
by big emmanuel from NY March 14, 2004
 
1.
(swel'bow) n. water filled balloon elbow(s) due to crash landings, typically from skateboarding in such terrain as pools, bowls, miniramps, vert ramps, or street.
Roger: "Dude, my swellbow is dormant... long as I don't slam on it or wear good elbowpads, it's good."

Mark: "Sweet! Keep it that way... swellbows are no bueno."
by Just another skater March 17, 2006
 
2.
When you fall on your elbow and it swells up.
Dude, I have the worst swellbow ever
by Sean Sallings July 31, 2003