Tuco's rule is from The Good, The Bad, and The Ugly. The rule is "When you have to shoot, shoot. Don't talk." Many a movie villain would have managed to wreak havoc on the world if only they'd followed Tuco's Rule.
"You see, Mr. Bond, I have already started the timer anBANG...ouch."
"Sorry, Brownfinger, it appears you forgot Tuco's Rule."
1) A psycho crystal meth sniffing kingpin from Breaking Bad known for yelling TIGHTTIGHT TIGHT during his orgasms, snorting meth off Bowie knives, frequently yelling his ass off, and beating his homies and others to death for absolutely no reason at all, sometimes giving them Columbian Neckties.
2) Tucoing - The act of doing shit that Tuco is known for doing
RackaRacka witnessed Ronald McDonald tucoing children in a Burger King playground, as seen in their Youtube Channel.
walter: jesse, we do not eat our product. it is for tuco salamanca.
jesse: mr. white!
walter: stop it.
jesse: heisenberg!
tuco: what are these?
jesse: they're popcorners, yo!
walter: say their name.
tuco (angrily): pop. corners!
tuco: tight! tight tight!!
narrator: break into something good.