Emphatic agreement — "that's completely true".

A one-word agreement meaning "that's true" or "I feel that".

Legitimate, acceptable, worthy of respect — applied to opinions, feelings and things alike.

A softer way of telling someone to stop being ridiculous.

Be F***ing For Real — telling someone to stop being ridiculous.

An expression of disbelief, disappointment or exasperation — a sigh in word form.

An exclamation of admiration or disbelief, usually drawn out.

Deliberately cultivating an impressive presence through calculated behaviour or posts.

Someone's presence or coolness, treated as a points system that can be gained or lost.

To talk excessively, especially about nothing important.

To lose control emotionally and do something reckless as a result.

Completely focused, in the zone, fully committed to a task.

Let someone continue what they're doing — trust the process, don't interrupt.

Finished, doomed, or in serious trouble — with no way out.

A genuinely good song, usually upbeat and catchy.

Out of date in an earnest, trying-too-hard way — especially millennial trends worn past their moment.

Did exactly what the moment required, and did it well.

To present a look or performance with total confidence and commitment.

Performed exceptionally well — "she ate" means she absolutely nailed it.

I understand completely, stop explaining — you've convinced me.

End of discussion — added after a statement to say there's nothing left to argue.

A one-word way of saying "that's exactly how I feel".

Acting as though you're the protagonist of your own film — sometimes aspirational, sometimes an insult.

Occupying your thoughts constantly without you wanting it to.