When at first a person seems like they're warming up to you or things are heating up, and then they turn cold; similar to heating up a plate of holiday leftovers where the first bite is hot and then the second bite is cold.
by _Well_Informed_ July 1, 2017
Holiday leftovers refer to the people who are invited over for Christmas and don't leave until New Years.
Louis- "Are there still Holiday leftovers?"
Brianna-" Yeah, right on the couch and they're starting to go bad -_-"
Brianna-" Yeah, right on the couch and they're starting to go bad -_-"
by xBadBarbiex December 27, 2011