Coleslaw

Something or some one already widely regarded as not as great as something or someone else (ex: the protein on a plate of food) but even more overlooked than its right to be labeled as mediocre (ex: macoroni, mashed potatoes, broccoli, etc.) Most likely immediately dismissed, disregarded, of disposed from any topic of conversation, never to be spoken of again, unless it (the subject) is involved in a conversation involving people or things of equal or lesser value (ex: chitterlings, boiled gizzards, Ryan Reynolds as the Green Lantern, etc.)

Guy 1: you heard that Desiigner freestyle?
Guy 2: Yes... That boy is coleslaw.

Looking back on the movie Space Jam, I don't see how I liked it. Straight coleslaw

Steph was cole slaw in the Finals.

(Also can use "slaw" for short)

(Ankle breaking cross over and jumpshot in defenders face)
Offensive player: somebody else guard me... This boy slaw.