also: ベースジャンピング
noun
BASE jumping
Refers to the extreme sport of parachuting from fixed objects like buildings, antennas, spans (bridges), and earth (cliffs).
彼はベースジャンプの経験が豊富だ。
He has a lot of experience in BASE jumping.
ベースジャンプは危険なスポーツとして知られている。
BASE jumping is known as a dangerous sport.
Skydiving involves jumping from an aircraft, while BASE jumping involves jumping from fixed objects.
Borrowed from English 'BASE jumping', an acronym for Building, Antenna, Span, Earth.