When someone does something really wrong. Or when someone just does something.

Used to express sarcasm when someone states the obvious, or states a fact that has been delivered like a second ago

literally speaking it is just another way of saying a very commonly and aptly used phrase "NO SHIT". it is when stating the blatant obvious and saying it as if it was just thought of on the spot. It is used to show distaste in a rather sarcastic and underhanded way and if said properly can be funny to no ends.

a master of this would be Christoffer!!

Really?

When a childish person (most likely a fuck boi) says some bullshit ass statement. The statement may represent something very queer and or ignorant.

A term used in AAVE, which is a contraction of the phrase "Boy, if you do not" followed by a course of action and a consequence,(however the AAVE often omits to course of action due to it being conspicuous enough to determine via context, and it invariably leaves out the actual consequence unless it genuine) literally speaking, this is a threat, but is often used in a jocose manner with those whom it is socially acceptable to be crass with, especially to burlesque and ridicule an individual's behavior; in practice it typically something more along the lines of an irreverent request to perform a stated or otherwise apparent course of action, or advisory discouragement of the opposite. The phase may also have "git'choh" added on to the end, representing a contraction of "get your"; when used in this manner the term phase can also be used as a filler word to attach insults to in the form of attributing pejoritove adjectives to ones "ass"

An expression which appears in rage comics as a cartoonized version of Nicolas Cage. The phrase is a response to anything obvious and functions the same as "No shit, Sherlock" and "thank you captain obvious".

What you say at the start of a question to influence the answer (usually to suit yourself)
Instead of asking "do you want..."

An almost sarcastic response to something so seemingly simple you shouldn't have to ask the question to begin with. Could also be an affectionate term meaning again that the answer should be obvious but you just missed it. It is said so quickly, it almost sounds like one long word.