plural dopers
Definition of doper
1
informal
a
: a person who frequently or habitually uses illicit drugs
He was a doper. He was loaded right now. Speed maybe. Or coke.— Joseph Wambaugh
b
: a person who sells illicit drugs
"Dopers are right on the cutting edge of technology," says Jimmy Davis of the Georgia Bureau of Investigation. "It used to be that you weren't a certified dope dealer unless you had a beeper. Now you're not a big-time dope dealer unless you're cellular."— Terry E. Johnson et al.
2
informal
: an athlete who uses performance-enhancing substances typically banned for use in sports
Already athletes from Great Britain and Australia who finished behind drug-using East Germans have begun asking Olympic officials to disqualify the dopers and rewrite the record books accordingly. — Sports Illustrated Human growth hormone is another protein, already widely abused by dopers, that builds muscle and aids recovery. — Bicycling
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Merriam-Webster unabridged
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Time Traveler for doper
The first known use of doper was in 1899
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