A dumpling-like, meat-filled dish that may be either fried or steamed listed in most Asian restaurants named for its ability to cling to the side of your plate. Also, a presumed appetizer for relatively obese people at Chinese restaurants.
(PURPOSEFUL, ONE TIME) this is something you utilize once, giving it meaning... and subsequently never using it again. This could be anything from a nickname to a concept.
An example would be when writing a paper, using a full breakout of a company name, and following it up with an acronym in parentheses... then never using that acronym ever again in the paper. Why put that acronym in there if you were never going to use it? POT-sticker