sleep on that 

Not aware of a current fad, trend, event, or anything.

Guy 1-"Ay man, i saw u spittin dat game over there"
Guy 2-See, u sleep on that right 'der.

sleep on that by Jèan-Jacques Brodin December 8, 2003

Put that in your pillow and sleep on it. 

Another, more sophisticated way for gentlefolk to say, “take that.”

George: “The mine will fail.”

Ross: “But our freedom never will.”
George: (defeated)
Ross: “Put that in your pillow and sleep on it.”

Put that in your pillow and sleep on it. by Ross Poldark June 9, 2019