make a no-no

idiom. Lay an egg; drop the bomb; take a shit.

Real citation: "After a commercial break during which "Tension" makes a no-no on the living room carpet and slinks off to a corner whimpering, we return to Syd waiting and guards stalking. Seriously, that's it. Of course, they find her, and ass-kicking ensues. It's all Jennifer Garner, however, so that's pretty cool. But the entire scene leading up to the ass-kicking was more boring than watching paint dry on the back of a dead cockroach"
(Erin, "The Passage, Part One," Page 9, Television Without Pity, http://www.televisionwithoutpity.com/story.cgi?show=75&story=4267&page=9&sort=&limit=)

Made-up citation: "Coffee in the a.m. makes me make a no-no quicker than I can say, 'Jesus holy shit Christ!'"