on the ball

Definition of on the ball

alert; competent and knowledgeable.

See also: Ball

Word:

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On horseback
On it
On liking
On live
On loft
On occasion
On one's guard
On one's hands
On one's honor
On one's last legs
On one's legs
On one's own account
On one's own hook
on paper
On penalty of
On shore
On sufferance
On tap
on the air
On the alert
-on the ball-
On the beam
On the bow
On the cards
on the coattails of
On the contrary
On the docket
on the dole
On the European plan
On the fly
On the go
On the hoof
On the jar
on the job
On the lee beam
On the line
on the lookout for
On the make
on the mend
On the nail
On the neck of
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