- poorly behaved; lacking good manners
Examples from the Web for ill-behaved
You suppose you may do as you like, but you are mistaken, you lazy, ill-behaved wench.Little Folks (July 1884)
Away with this ill-behaved, shameless deserter of his wife, and away with her too!
But now you know him, and you know, too, how ill-behaved he is!A Christmas Greeting
Hans Christian Andersen
Who was she to have dared speak to them of the evil of their ways, and the bad influence of an ill-behaved family!Weighed and Wanting
He would still have been giving instruction in reading and writing to ill-behaved youngsters.Casanova's Homecoming