Anne Sullivan

If the child is left to himself, he will think more and better, if less showily. Let him go and come freely, let him touch real things and combine his impressions for himself.

American Educator

Used when someone wants to stand out or be the center of attention, often in a showy way.

Attention Seeking

Sometimes implies that the person is being too extravagant or lacks subtlety, which might not be appropriate in all situations.

Potentially Negative

Often used for describing appearances at parties or events where making a bold impression is desired.

Showily