step on

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

step on (third-person singular simple present steps on, present participle stepping on, simple past and past participle stepped on)

1. Used other than figuratively or idiomatically: see step,‎ on.
2. (recreational drugs, transitive) to adulterate a drug for the purpose of increasing its bulk, and therefore its profit; to dilute, cut.
   • 1994 December 18, NICK LEZARD, “Stepped-On X”, in alt.psychoactives‎ (Usenet):

     This seems implausible. If ecstasy is going to be stepped on, you'd dilute it with something cheaper than heroin.

• Pontes, netops, pontes, posnet, septon