Wiktionary
n. (context sports English) The blow of the whistle by the referee or other adjudicator signifying the end of the match.
Usage examples of "final whistle".
He wouldn't be the first man who relaxed too much when the game seemed overwhelmingly as good as won -- and finished up at the losing end when the final whistle blew.
After the final whistle blew Shasa lingered just long enough to congratulate his son, with an effort restraining himself from hugging the sweaty grinning youngster with grass stains on his white shorts and a graze on one knee.
Domitien had been among the athletes staggering toward the flag when the final whistle blew.
When I blow the final whistle, the players on both sides all turn to face me, and swear as one.
After the final whistle Isabella produced a twokilo bag of toffees and chocolates from her gift-box, and her lack of athletic prowess was immediately forgiven by her captain and both teams.
Trouble is, that stupit cunt Billy's only gone an' won us a corner, so we re aw up the other end when the ref blaws the final whistle.
The score was, say, 10-2, and you had to wait ten minutes, say, for the anticlimax of the final whistle.