To spit it out, spill the beans, or finally say something that was being held back. (The term literally refers to a bird emptying its crop, used here as a metaphor for purging information).
- Well, the thing is that I... - Just say it already! Desembuchá!
To scope out or size up a situation to see what is going on and report back to others (derived from the word for folder, referring to the act of gathering information).
I am going to carpetear what is happening in the street and then I will tell you.
The act of snitching or ratting someone out. It refers to a betrayal where a friend or another person reports or accuses you to the authorities, causing a mess of your situation.
That asshole put the cagada when he reported you to the police.