Well, if you don't know what to search in the urban dictionary, why not try to solve this problem:
Evaluate ∬ yz+4xydS where S is the surface of the solid bounded by 4x + 2y + z = 8, z=0, y=0, x=0.
S
A: "I don't know what to search so I searched i don't know what to search."
B: "You searched i don't know what to search so that's means you know what to search. Liar."
1. An answer to questions that most people will understand and offer their concencus; usually trails off to allow for some exchanging of looks
2. Can be used when you just don't know how to answer a question
3. A phrase that is often used to answer questions, even when the inquirer may NOT know; often results in strange, confused looks and/or annoyed glares, especially when answering a question that no one could POSSIBLY know the answer to
Guy 1: Man, that girl sure is hot, huh?
Guy 2: Ya know...
Guy 1: *nods in agreement*
(exchange looks of mutual understanding)
OR
Guy 1: So, how do you think you did on the Physics test last period?
Guy 2: Ya know...
Guy 1: *nods in agreement, then realizes "wait...how could I POSSIBLY know that??" looks befuddled and walks away, annoyed*
"You don't know your ass from a hole in the ground." Illustrate with a pen and paper drawing a circle and a cracked circle. Now ask which is your ass and which is the hole in the ground. Subject points to cracked circle and you mock while pointing to their real derriere.
After listening to untruthful gibberish, you say to person, "you don't know your ass from a hole in the ground."