When the Boston tea party were rumbled by the british, whilst drinking tea. They were awful at improvising a term so decided to 'Teaspoon Leg it out of here'.
This can be used to get out of a situation of awkwardness.
Person 1: How did you get out of the sit with that arsehole Miles?
Person 2: I totally had to teaspoon leg it out of here
Famously, one of Biff Tannen's taglines in Back to the Future movies. The otherones being "Shiiiit!" and "I hate manure!"
Young Biff: All right, I'll give it a look. Now why don't you make like a tree and get out of here?
Old Biff (hitting Young Biff upside his head): It's LEAVE, you idiot! "Make like a tree and leave!" You sound like a damn fool when you're saying it wrong!