If You Know, You Know — a nod to people already in on a reference.

Excellent, impressive, extremely good.

Is excellent — used almost exclusively about music, sometimes food.

Affects you more powerfully than usual, often because of timing or context.

Greatest Of All Time — the best there has ever been at something.

A dramatic improvement in appearance, confidence or life circumstances over time.

To show off, or the thing being shown off.

Showing off your outfit, or asking others to rate it.

Stylish clothing and accessories — an outfit that signals taste and money.

To throw something with force, or an exclamation shouted while doing it.

Screenshots or other proof backing up a claim about someone.

Gossip, or the truth about a situation. "Spill the tea" means share it.

Looking extremely good — sharp, well put together, flattering.

Shocked, rattled, emotionally thrown by something.

Unnecessarily upset or bothered about something.

Bitter or resentful, usually about losing something small.

Desperate — usually about a crush, sometimes about life going badly in general.

Someone who does excessive favours or flattery for a person they're attracted to, hoping for affection.

A sudden, irreversible feeling of repulsion toward someone you were attracted to.

An exclamation of shock at someone's body, usually their backside. Also spelled "gyatt".

I swear — an oath that what you're saying is true.

Seriously, genuinely — an insistence that you are not joking.

For real — agreement, or emphasis that you mean what you said.

About to — a contracted spelling of "about to".