noun
biker; motorcyclist
Loanword from English 'biker', referring to a person who rides a motorcycle, often with a connotation of motorcycle culture or lifestyle.
彼は週末になるとバイカー仲間とツーリングに出かける。
On weekends, he goes touring with his biker friends.
あのカフェはバイカーに人気のスポットだ。
That café is a popular spot among bikers.