adjective
loco
LOH-koh/lˈoʊkoʊ/
Behaving wildly or irrationally.
The gardener's loco method sends water onto an umbrella instead of the plant.

Etymology
Spanish loco already meant “insane,” so the English adjective carries over that meaning rather than developing it from another image. The Spanish word’s deeper origin is uncertain.
In context
He's crazy. He's crazy. Loco. That adrenaline rush is unbelievable.
More examples
- That plan sounds loco.
- The character acts completely loco.
- He called the stunt loco.
Forms
loco
Similar words
- irrational
- The neutral descriptive term.
- wild
- Unrestrained without necessarily unreasonable.