900 number:

A telephone number-one dials for phone-sex (lewd or suggestive talk).

Quote: Michelle Huddleston (Brenda Bakke) to Topper Harley (Charlie Sheen) in Hot Shots! Part Deux (1993): ' If you should change your mind, here's my 900 number. It's five dollars a minute; I'll wave the charges .'

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