bum·mer /ˈbʌmɚ/
無賴,遊民,遊蕩者
bum·mer n.
1. An idle, worthless fellow, who is without any visible means of support; a loafer; a dissipated sponger; one who bums. [Slang, U.S.]
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bummer
n 1: an experience that is irritating or frustrating or
disappointing; "having to stand in line so long was a
real bummer"
2: a bad reaction to a hallucinogenic drug