Definition (活动)
to engage in sexual activity with someone
与(某人)做爱
They were attracted to each other at the party and decided to knock off.
他们在派对上互相吸引,并决定发生关系。
She invited him to dinner and hinted that they could knock off later.
她邀请他共进晚餐,并暗示他们之后可以发生关系。
This couple often knocks off together on the weekends.
这对情侣经常在周末一起发生关系。