- dementia praecox,
- dementia pugilistica,
Origin of demented
Examples from the Web for dementedly
"The Guard" is a cross between Quentin Tarantino and Edgar Wright—and one of the most dementedly fun movies screened so far.
After 10 minutes or so, all but the dementedly committed grown-ups will feel they have done their duty to democracy.
1640s, from obsolete dement "drive mad."