DictionarylocoIrrational
adjective

loco

LOH-koh/lˈoʊkoʊ/

Behaving wildly or irrationally.

The gardener's loco method sends water onto an umbrella instead of the plant.

A gardener foolishly shields a wilted potted plant with an umbrella while pouring watering-can water onto the umbrella, diverting all the water away from the dry soil.
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

MagellanTV35:28
He's crazy. He's crazy. Loco. That adrenaline rush is unbelievable.
Risk Takers - 107 - Bull Fighters | FULL LENGTH | MagellanTV

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.