Snuffed It

Whenever an awkward moment is preceded by a person telling joke, a story, or adding a comment to a conversation, the said person "Snuffed it".

Also, a person telling a joke, story, or making a comment that has the potential to be funny or interesting, but completely messes it up.

"dude, I can't believe you told that joke that George told last night. You totally snuffed it."