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!
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."