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The term "base drop" originated from dubstep music. Over the years, dubstep has had an increasingly large part in outdoor films, especially skiing, snowboarding, and mountain biking. Often times when a dubstep song is used in one a ski or bike film, a "base drop" is used to emphasize a trick. The term "base drop" is now being used widely to describe a trick done on skies, bikes, or snowboards.
Dude 1: Check out this rad base drop I'm gonna pull!

Dude 2: That was gnarly brah!
by Proveyourpoint June 04, 2014