To be taken by a ponzi scheme. To lose money on a venture when one party doesn't live up to its' agreements. To get stung in a bad deal where one side doesn't live up to expectations.
"Our company is thinking of sponsoring that race team, but we need to perform better due-dilly so as not to get stingered again."
"We tried to pre-order that new crowd-funded widget, but we got stingered and the company never delivered. I'm still waiting!!!"
(n) The act of raising the expectations of forum members by posting a story (typically regarding a member of the opposite sex) as it develops in real time, updating every three or four minutes but ultimately failing to provide a conclusion.
Forum member A: So what happened with you and that girl mikey?
Forum member B: Yeah, what happened
(no response from mikey after 2 days)
Forum member A: OMGWTFBBQ we've been syringered.