Happy dance
From Omnictionary
The way a nerdfighter celebrates an achievement or the achievement of others by dancing in a specialized way.
The Happy Dance Collaboration Video
Description
The Happy dances of each respective nerdfighter is different. Similar to a thumb print or to one's DNA. One can have more than one Happy Dance, however it is advised to stay consistent. They are usually very jokes, however, if a nerdfighter steals another's Happy dance, it is very tragic. It is the identification system of nerdfighters at times, as, if you see a person dancing with joy in the middle of a communal location, chances are, he or she is a nerdfighter. However nerdfighters mid-happy dance should be approached with caution as this heightened state of elation should not be interrupted.
Note: It is very important that Happy Dances are not mistaken for real dancing. If a Nerdfighter is at an event that involves dancing, and they have a reason to do a happy dance, they should look entirely out of place, and heads should turn.

