good in bed; skilled lover
Dated term for someone who is sexually skilled or performs well in bed. Often used in a somewhat old-fashioned or playful manner.
彼は床上手だと噂されている。
He is rumored to be good in bed.
あの人は床上手らしい。
That person seems to be a skilled lover.
Compound of 床 (とこ, 'bed') and 上手 (じょうず, 'skillful'). The exact origin is uncertain, but it likely emerged as a colloquial expression in the Edo period or later.