A dumbass, fool, or a useless person. It describes someone who is slow, clumsy, or seen as a loser that others can boss around (in Chile, this is often used to describe a lackey or someone who is socially inept).
Come on you fucking lonji, bring me the milk. We are going to beat up that lonji.
Used by young people and students to describe a nerd, square, or goody-two-shoes. A Perno is someone who follows every rule, is very studious, and dresses too neatly or formally. They are typically socially awkward, shy around the opposite sex, and afraid of taking risks or getting into trouble. Because of their timid nature and lack of social cool, they are often targets for bullying. In university, it refers to someone who is unadventurous or seems too fearful.
- Look, he dresses like a Perno. - Your girlfriend is such a Perna. - Did you see the new kid? He is such a Perno!
To fall for a lie or a prank hook, line, and sinker. It describes being incredibly gullible (literally means to enter barefoot, suggesting walking into a trap unprotected).
A: I hooked up with your sister. B: For real? A: Yeah, man. B: This guy hooked up with my sister, dude! C: No way, man, she would never give him a chance. You are such a total loser, entray a pata pela.