Tony the Tiger ass

Someone who has made plans but fails to follow through with them.

Guy 1: "Yo dude Where you at? My birthday party is today."

Guy 2: "I can't come. I have other stuff to do."

Guy 1: "Dude we had this planned like 10 weeks ago!!"

Guy 2:"I know my fault man. Next time for sure."

Guy 1: "Tony the Tiger ass"

Guy 2: "Lol what?"

Guy 1; "You're always flaking on me. You're a Frosted Flaker!"