What does "step on" mean?

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

What is a synonym for "step on"?

Common synonyms include: tread on.

verb, slang

verb, slang ·Moderate ·College level

Verb

1
To adulterate (a drug) for the purpose of increasing its bulk, and therefore the profit when sold; to dilute, cut. transitive
"This seems implausible. If ecstasy is going to be stepped on, you'd dilute it with something cheaper than heroin."
2
place or press the foot on wordnet
3
To oppress or mistreat (a person). transitive
"He had been stepped on so many times he just didn't even get angry anymore."
4
To interrupt, overpower, or override (another transmission on the same frequency) with one's own transmission. transitive
5
To approach as to confront or fight. dated, intransitive
"He stepped on to the vicious man."

Show 2 more definitions

6
To intrude on someone else's turf or portfolio. slang, transitive
"They're stepping on our operations."
7
Used other than figuratively or idiomatically: see step, on.
"He stepped on a rock."

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