skate term for when a skater attempts to ride the board down a long/steep hill. The hill is usually loaded with cracks, holes and pebbles to make it more difficult for the skater to reach the bottom without falling. Can be amazing if done successfully, horrific if failed
Example 1:
Friend: Whoa this hill is steep AF
Skater: Yeah, this is gnar. I'm gonna hill bomb it

Example 2 (Vine):
Off camera guy: What's your name?
Kid: Marty McFly Williams
Off camera guy: And what are you about to do?
Kid: I'm about to bomb this master hill
(proceeds to eat shit)
by Prodigy087 January 7, 2020
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to ride down a hill using a longboard or skateboard as fast as possible
dude, me and josh were justs bombing hills and didnt fall once. SICK!!!
by sk8islife April 11, 2015
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verb. "Bombing hills" is the act of riding a downhill longboard down a hill. It can be used to mean any sort of riding, but specifically it means "to ride as fast as possible to the bottom."
Josh loves bombing hills on his longboard.

"Hey Vicente, let's go bomb some hills"
by Josh Carlson September 3, 2006
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used as a verb, "bombing hills" is the act of riding down a hill on a longboard (a downhill longboard, not a surfing longboard). You can do this in any number of ways (see longboard for examples), and no matter how you do it, it's pure fun.
Josh loves bombing hills on his longboard.

"Hey Vicente, let's go bomb some hills."
by Josh Carlson September 2, 2006
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