argue the toss

US /ˈɑːrɡju ðə tɒs/
UK /ˈɑːrɡju ðə tɒs/
"argue the toss" picture
1.

決定に異議を唱える, 既成事実を争う

to dispute a decision or choice that has already been made, especially when it is too late to change it

:
It's no use arguing the toss now, the deadline has passed.
今さら決定に異議を唱えても無駄だ、締め切りは過ぎた。
The manager made his choice, so don't even try to argue the toss.
部長はもう決めたんだから、異議を唱えようとするな。