- 1) Crazy bastard, completely wild.
Chris is batos loco.2) Vato Loco = crazy guy in Spanish and refers to a gang member. There is no such slang word as batos unless you were referring to more than one vato. V and 'B are often confused in Spanish; varrio instead of 'barrio.
Los vatos locos viven en las calles toda el pinche dia. The crazy guys stay in the streets all day.
Dictionary of american slang with examples. .