I'm on the ball like FIFA
FIFA is the world Soccer/Futbol federation (stands for Fédération Internationale de Football Association)
‘I’m on the ball’ is an idiom meaning I’m focused, I know what’s going on. This is a very well known idiom in the U.K.
In football (soccer) the player “on the ball” is the playing running with and controlling the ball — therefore the most important player on the field at that particular moment in the game.
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