Classic Hanky codes include Hustler, flagging left considered ‘someone who will spend time for cash’ and flagging right considered a ‘john’ who is looking to pay someone for their time…
Closely related is Lime Green (lm.gn) which flagging right is ‘Provides meals’ and flaggin left is ‘buy me a meal’.
In the Hanky2 fetish codes, KL.GN2kl.gn is the recreation of Kelly Green [hustler].