a bit of rough

A person who has a lower socioeconomic status than their romantic partner. Primarily heard in UK. When Jenny, a refined and successful businesswoman, started dating a plumber, many of her colleagues secretly called him a bit of rough.

bit of rough

a (usually male) sexual partner whose toughness or lack of sophistication is a source of attraction. informal

1998 Spectator The programme dwelt at length on the maestro's interest in extramarital sex, particularly with below-stairs women—what would be called these days a bit of rough.

a bit of ˈrough

(British English, slang) a person of a low social class who has a sexual relationship with somebody of a higher class