🤝 handshake

✋ high five

👊 fist bump

✌ peace sign

🫶 hand-heart

air quotes

😘 kiss (hand ? cheek ? lips ?)

nodding (vertical ? horizontal ?)

A tiny movement can carry socially learned meaning.

The physical movement alone is not enough.

A raised thumb means something because other people already know how to interpret it.

The same movement can mean different things in different cultures.

A meme therefore often contains both performance and interpretation.