noun
one's own bowling ball
Used in bowling contexts to refer to a personally owned ball, as opposed to a house ball.
wasei-eigo (Japanese-coined English), from my ball
彼はいつもマイボールを持ってボウリング場に行く。
He always takes his own bowling ball to the bowling alley.
noun
team possession; control of the ball
Sports term, especially in basketball, meaning that one's own team has possession of the ball.
マイボールになったら、すぐに攻めに転じよう。
Once we get possession, let's switch to offense right away.