- noun a girl, particularly a non-participant in sports such as skateboarding. A mildly derisory usage among some teenagers, possibly inspired by the character played by Michelle Dotrice in the TV comedy series Some Mothers do ’ave ’em. In the late 1980s Betty became a vogue word in the USA, often used to mean an attractive or popular girl. (In East Anglian dialect Betty – perhaps coincidentally – is a prefix signifying female, as in ‘Betty-cat’.).