on one's game

== English == === Prepositional phrase === on one's game (informal) Performing as well as one can. Synonym: at the top of one's game Antonym: off one's game ==== Further reading ==== “on one’s game”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “on ones game”, in Collins English Dictionary, 2011–present.