"omg you postwench. i can only say one thing in response - tl;dr"
"tl;dr...why dont you give up on your unabridged edition of War and Peace or at least stop posting it here?"

Person A: Hi, do you know anything about where Jamie and Brad are?
Person B: tl;dr
Person A: Uh... How should I have said that?
Person B: do u no where jamie n brad r
Person A: AGH... It burns!

~ ME:
.....Therefore you suck fabulous donkey shit cock.
~ "Smart Troll" Not Used To Being Beaten:
*yawn* tl;dr
~ Me:
...Right, well, as believable as that is, you've got time. Just sound the bigger words out. Now I can see why your friends say you're so "smart".

"Did you read the fourth definition, it was quite witty!"
"no tl;dr"

Spanky - "I find it hilarious that any definition of TL;DR condeming those who use it as uneducated morons, are the ones receiving more thumbs down - just like this one probably will - even though they are the most accurate. That just further proves that people - especially kids - have a consistantly dwindling attention span, most likely indirectly proportional to the amount of media and entertainment devices we feel the need to constantly plug ourselves into."
Spunky - "... TL;DR"
Spanky - "Are you sure it wasn't TMS;DU?"
Spunky - "... l0zz0rs, pwned."

a)
Guy One: Did you read that book for English class?

Guy two: No, tl;dr.

B)
Guy one: Cake is a form of food that is usually sweet and often baked. Cakes normally combine some kind of flour, a sweetening agent (commonly sugar), a binding agent (generally egg, though gluten or starch are often used by vegetarians and vegans), fats (usually butter, shortening, or margarine, although a fruit purée such as applesauce is sometimes substituted to avoid using fat), a liquid (milk, water or fruit juice), flavors and some form of leavening agent (such as yeast or baking powder), though many cakes lack these ingredients and instead rely on air bubbles in the dough to expand and cause the cake to rise. Cake is often frosted with buttercream or marzipan, and finished with piped borders and crystallized fruit.1

Cake is often the dessert of choice for meals at ceremonial occasions, particularly weddings, anniversaries and birthdays. There are literally millions of cake recipes (some are bread-like and some rich and elaborate) and many are centuries old. Cake making is no longer a complicated procedure; while at one time considerable labor went into cake making (particularly the whisking of egg foams), baking equipment and directions have been simplified that even the most amateur cook may bake a cake.

tl;dr: Cake is a baked, yummy sweet.