adjective
- crazy or mentally unstable
Usage: slang
noun
- a locomotive
Usage: informal
Examples
- That idea sounds completely loco to me.
- He went loco when he heard the news.
- The old loco pulled into the station with a loud whistle.
- They restored the vintage loco for the museum display.
- Don’t go loco over such a small problem.
- The loco chugged slowly up the mountain track.