床友

chuángyǒu
  1. (slang) friend with benefits
  2. casual sex partner

CEDICT

slang

Entry Composition

=1 床 chuáng
  1. bed; bottom (of rivers, oceans, gardens etc)
  2. frame; chassis
  3. classifier for blankets, quilts etc

classifier: 張
=1 床 chuáng variant of 床 chuáng
2 友 yǒu friend