Creepypasta (Wikipedia - Definition)

Urban legends or scary stories circulating on the Internet, many times revolving around specific videos, pictures or video games.^[324] The term "creepypasta" is a mutation of the term "copypasta": a short, readily available piece of text that is easily copied and pasted into a text field. "Copypasta" is derived from "copy/paste", and in its original sense commonly referred to presumably initially sincere text (e.g. a blog or forum post) perceived by the copy/paster as undesirable or otherwise preposterous, which was then copied and pasted to other sites as a form of trolling.

Link: http://en.wikipedia.org/wiki/List_of_Internet_phenomena#Other_phenomena

Algebra Definition

Definition: A branch of mathematics that substitutes letters for numbers. An algebraic equation represents a scale, what is done on one side of the scale with a number is also done to the other side of the scale. The numbers are the constants. Algebra can include real numbers, complex numbers, matrices, vectors etc. Moving from Arithmetic to Algebra will look something like this: Arithmetic: 3 + 4 = 3 + 4 in Algebra it would look like: x + y = y + x 

Source: http://math.about.com/cs/algebra/g/algebradef.htm