step on

present singular third person steps on · participle present stepping on · participle past stepped on · past stepped on

1. transitiverecreational drugsTo adulterate (a drug) for the purpose of increasing its bulk, and therefore the profit when sold; to dilute, cut.

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

   1994 December 18, NICK LEZARD, “Stepped-On X”, in alt.psychoactives (Usenet)

2. transitiveTo oppress or mistreat (a person).

   He had been stepped on so many times he just didn't even get angry anymore.

   1985 April 20, Terry Baum, Monica Hileman, “Fighting Self-Censorship”, in Gay Community News, page 12

   1 more example

   When that happens, you'll be able to move beyond simply trying to avoid being stepped on or stepping on others in your blended family, and you can concentrate on your real goal: […]

   2001, Kevin Leman, Living in a Step-Family Without Getting Stepped on, page 264

   Synonyms: tread

3. transitivebroadcastingTo interrupt, overpower, or override (another transmission on the same frequency) with one's own transmission.
4. datedintransitiveTo approach as to confront or fight.

   He stepped on to the vicious man.

5. slangtransitiveTo intrude on someone else's turf or portfolio.

   They're stepping on our operations.

6. Used other than figuratively or idiomatically: see step, on.

   He stepped on a rock.