bum (something)
To borrow or use something that belongs to someone else. Hey, can I bum a pen?
bummed (out)
Sad or discouraged. Todd just heard that he didn't get the job, and he's really bummed out. I can't watch the news because it always makes me bummed.
bummed (out)
Sl. discouraged; depressed. I feel so bummed. I think I need a nice hot bath. When you're feeling bummed out, think how much you've accomplished.