Top Definition
A traffic hazard officially named "curb bulbout". Named after the Mayor of Santa Barbara, Marty Blum, who allowed these hazards to be constructed in street intersections.
Synonyms: "peaks of destruction", "claws of death", "street pinchers", "artery cloggers", "cyclist hazards".
That car hit the Blum Bump when he turned. That Blum Bump needs to be repainted red because of the tire marks.
by psnack January 27, 2009

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