A yard fighter is a low-class, violent person whose chief form of expression is yelling at and fighting with members of his/her family in public. Such dramatic displays often take place in the front yards of mobile homes or in Wal-Mart. Yard fighters are responsible for the majority of police domestic dispute calls. Typical dialogue (shrieked as loudly as possible for maximum effect): "Before my mama went to prison, she told me you was no good - no damn good!"
My brother's first wife was a yard fighter. Thank God he finally divorced her.