Cuco (en. Cuckoo)

/ˈku.ko/

Synonyms

Slang Meanings

A person who seems harmless but can be dangerous.
Don't trust him, he seems like a cuco.
No te fíes de él, parece un cuco.
Something used to scare someone in a humorous way.
I scared my sister and she almost fainted.
Le hice un cuco a mi hermana y casi se desmaya.