An expression of mild exasperation or frustration - may be used as a substitute for a curse word at work or in front of children. (Inspired by the first Kid President pep talk).
Roomie #1: Where's the rest of the cake from last night? I was planning to have it for breakfast...

Roomie #2: I ate it after you went to bed...sorry.

Roomie #1: Not cool Robert Frost!
by IDStarGirl October 18, 2020
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to discontinue a pleasant activity or or leave an entertaining event prematurely due to prior engagements or commitments
"Hey man, this party is really picking up."
"I know, but I promised my friend I'd go party at his place. I'm gonna Robert Frost it."
by Ra$PutiN December 30, 2011
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