Loco (adjective)

1. Crazy, insane.
2. Deranged, irrational.

Origin:

Mid 19th century: spanish, from latin locus 'place'.

Examples:

1. The prisoner was considered loco and was locked up in a mental institution.
2. The comedian's loco behavior had the audience in stitches.
3. People thought the inventor was loco when he presented his idea for a flying car.
4. The carnival ride was so intense that it made me feel loco!
5. The loco monkey was swinging from branch to branch and howling at the moon.