Person 1: You're a cutie 3.14
Person 2: Wtf? Do I look like a math book to you?
Person 1: What? No...I meant...
Person 2: Yeah, if that's how you-
Person 1: Look it up on urbandictionary.com, asshole
(Person 2 looks up the definition of "cutie 3.14")
Person 2: Oh...
It's mathematics slang for cutie pie. Seeing as 3.14 is the value of pi, well actually 3.141593 is probably closer even though it's an infinite number so 3.14 will do, but yeah you can catch my drift.
Usually in a text message or written/typed message of some sort:
Guy 1: Did you see andrea?
Guy 2: Yeahhh! She's a QT 3.14
Guy 3: lol i see what you mean. lol.
Similar to Rule 34 and 88 If it exists there is, or will be pie of it.
J: I feel like pie.
K: Okay, cherry pie? Apple?
J: No, I feel like... J pie.
K: okay, here, step into this pie tin and put this cream on yer head. J ala Pie. You've been Rule 3.14'd.