noun
highside; highsider
A motorcycle crash where the rear wheel loses and then regains traction, throwing the rider over the high side of the bike. Used in motorcycle racing and riding contexts.
コーナーでハイサイドを起こしてしまった。
I highsided in the corner.
ハイサイドは非常に危険な転倒の仕方だ。
A highside is a very dangerous way to crash.