bummed out in English dictionary bummed out Meanings and definitions of "bummed out" (slang) Depressed, disappointed, in a gloomy mood. Simple past tense and past participle of bum out. adjective (slang) Depressed, disappointed, in a gloomy mood. verb simple past tense and past participle of [i]bum out[/i] more Grammar and declension of bummed out bummed out ( comparative more bummed out, superlative most bummed out) bummed out (comparative more bummed out, superlative most bummed out) more Sample sentences with "bummed out" Declension Stem Match words all exact any Try again Available translations Dutch German Italian Japanese Polish Portuguese Spanish Swedish Authors