a term used to describe a person (often a woman) who does not think before acting and most times acts on pure impulse.
Some start off intellectually or emotionally retarted which eventually leads to being a dingbat. Others are born that way and are cursed with being a dingbat for life.
ex: I dated some real dumb chicks, but that Courtneygirl was the biggest "dingbat" I ever encountered.
A childs toy from the 1970's that consisted of a platic table-tennis like bat with a rubber ball attached to the centre by elastic.
The ball could be hit repeatedly and always come back.
Female, and perhaps effeminate males, that are exceptionally flighty and irresponsible are often called dingbats. Reason and accountability are concepts that dingbats refuse to acknowledge.
The dingbat got a speeding ticket on the way to her hair appointment. She was not upset about receiving the citation, but was very unsatisfied and upset about her bad haircut.