A fork of Rural Dictionary
(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."