The undying bond of friendship and trust. Made to signify that you dare not mislead or hide things from your closest friends.
If you make lago its for reals. Only a big douchebag would break it. The punishment for breaking lago includes humiliation and disgrace in front of all those around you, a feeling of worthlessness, and getting punched really hard. Don't break lago.
Lago's enemies include:
Fuck that lago shit!
I made out with three fine honeys last night.
Really? Make lago!
*pinkies pointed out about to intertwine, suddenly that first chap sticks 'is pointer finger out (which is, in reality, Not Lago)*
That ain't lago!