bum·mer
noun/ˈbʌmə(r)/
/ˈbʌmər/
a bummer
[singular] (informal)- a disappointing or unpleasant situation
失望（或不愉快）的局面 - It's a real bummer that she can't come.
她不能来，实在令人失望。
Word Originmid 19th cent.: perhaps from German Bummler, from bummeln ‘stroll, loaf about’. - It's a real bummer that she can't come.