"uppers" in the noun sense
1. upper berth, upper
the higher of two berths
piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot
"Uppers come in many styles"
3. amphetamine, pep pill, upper, speed
a central nervous system stimulant that increases energy and decreases appetite used to treat narcolepsy and some forms of depression
Source: WordNet® (An amazing lexical database of English)
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