雅思口语常用俚语之crumb bum

English Slang collection：
crumb bum
[释] someone who acts completely like a fool;
[例] Would you please stop being a crumb bum in public? Everybody's looking at us.;
crummy
[释] something really small and quite pathetic;
[例] The show in the bar last night was really crummy!
crunch numbers
[释] to do math, calculation;
[例] Accountants usually have to crunch plenty of numbers by the end of each year.;
crunch time
[释] a deadline/the last minute;
[例] It's getting pretty close to crunch time, better finish that report soon.
crunchy
[释] exhausted, not well;
[例] I think I need to see a doctor as I've been feeling crunchy since this morning.;
crunchy
[释] to feel embarrassed after having done or said something bad;
[例] I feel crunchy for yelling at Michael on the phone.