Front, the n.
1. (UK gay/Und.) any street that is known as a centre for prostitution, e.g. Piccadilly, Oxford Street; King's Cross in Sydney.
|Absolute Beginners 71: We’d now reached a street down near ‘the Front’, as the girls on the game call the thoroughfare.|
|Signs of Crime 184: Front, the Oxford Street.|
|You Wouldn’t Be Dead for Quids (1989) 108: There’s a bunch of coppers [...] going up and down the front all the time Sunday night.|
2. (UK teen) the main street of a gang’s territory.
|Lowspeak 61: Front [...] the main street.|