toss for (something)
To flip a coin with someone in order to decide or determine who gets to have or do something. A name or personal pronoun can be used between "toss" and "for." We both wanted to go with him to the concert, so we decided to toss for it. A: "No, it's your turn to do the dishes." B: "Aw, come on, I'll toss you for it!" There's only one chocolate bar left, so let's toss for it.
toss (someone) for something
Fig. to decide with someone, by tossing a coin, who will get or do something. Let's see who gets to go first. I'll toss you for it. I'll toss for it. Let's toss for it.
To compete for something by flipping a coin to determine the winner: There's one window seat, so let's toss for it. The candidates tossed for the chance to speak first at the debate.