I. noun Etymology: probably modification of German Bummler loafer, from bummeln to dangle, loaf Date: 1855 one that bums, II. noun Etymology: 2bum + 2-er Date: 1966 an unpleasant experience (as a bad reaction to a hallucinogenic drug), failure , flop
BUMMER
Meaning of BUMMER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012