put on the red light

slang To make it known that one engages in prostitution. Refers to the use of red lamps to show that an establishment is a brothel. A: "Tom's new girlfriend used to put on the red light—if you know what I mean." B: "Whoa! Does he know that?"

See also: light, on, put, red

See also:

hit on (one)
hit on someone
hit on, to
flush with cash
harp on
harp on (one) (about something)
get a look-see (at someone or something)
hard on the eyes
get this
Can you/we say (something)?

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