Meaning: crazy, insane
- I'm sure the new tenant in Apartment 4 is loco. I heard her screaming something about little green men coming in through her window.
- My cousin Jill went a bit loco after she'd had her third child, but she's much better now.
Origin: "loco" is the Spanish word for insane, and it was first borrowed into English in the late 19th century
If your friend is going a little bit loco, you could suggest they