Main definitions of FWB in US English:

: FWB1FWB2

FWB1

abbreviation

  • Four-wheel brake.

Main definitions of FWB in US English:

: FWB1FWB2

FWB2

noun

informal
  • ‘she already has a FWB’
    short for "friend with benefits"
    as modifier ‘he was honest about wanting a FWB relationship’