noun
friend with benefits; hookup buddy; fuck buddy
Wasei-eigo term for a casual sexual partner without romantic commitment. Often abbreviated to セフレ in informal speech.
wasei-eigo (Japanese-coined English), from sex friend
See also: セフレ
彼はセックスフレンドが何人かいるらしい。
He seems to have several friends with benefits.
セックスフレンドって、恋人とは違うの？
Is a friend with benefits different from a romantic partner?