pigs don't fly

a phrase used to mean "civilized" (however one defines this word) people don't behave the way you do. One can also add the adjective "normal" in front of the adjective civilized.
a boy, after having been to physical science class in elementary school and having learned the basics of electricity, tries putting scissors in the kitchen plug.

His mother starts screaming at him:

mother: is this f-sag you twit? what are you doing, you'll create sparks and burn the damn house down. Pigs don't fly. Go to your room now. She then takes a broom and starts chasing him around the house.

son: I can attach balloons to anything i want, (turn anything I want into a fad or trend) no?
by Sexydimma May 24, 2012
mugGet the pigs don't flymug.