Refers to either a laughter-filled sporting-match between an aging humorist and a pro-football player (both wif da same first name, by da way), or an equally-uproarious round of friendlyverbal sparring between said two Daniels.
Depending on whether a "Drinkwater vs. Pinkwater" competitioninvolved muscles or brains, either of them might have a comparable chance of being da winner.