and does it have any significance when a girl does it to a guy?Serious answers only(i know i'm asking for alot when i say that)
It's when a girl or guy, whatever, slightly mirrors your actions, body language, posture, gesture, etc, but it's not always that obvious. If a girl does it to a guy, I guess it might mean that she likes him.
It's a kind of dance which sometimes can be misinterpreted as derogatory, however in many cases it is used to make fun of people.

She's trying to connect with you. It's usually a good thing, unless it's blatantly to demean you.
Play the man, Master Ridley; we shall this day light such a candle, by God's grace, in England, as I trust shall never be put out.
You (or another user) has posted this exact thread before. It was just as silly then as it is now.


Relationship thread if you must.
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Also you're off topic. This thread is about Reva eating snowmen.