The 'Hokey Cokey', or 'Hokey Pokey' as it is known in the United States, is a communal dance to a song of the same name. The dance originates from a British folk dance of the 1820s, and peaked in popularity in the mid-1940s. The well-known song used for the dance today was first recorded by the Snowmen in 1981.

In the book 'English Folk-Rhymes' (1892) a version of the song appeared written as: "Can you dance looby, looby, Can you dance looby, looby, Can you dance looby, looby, All on a Friday night? You put your right foot in; And then you take it out, And wag it, and wag it, and wag it, Then turn and turn about."

Today's lyrics read "You put your left arm in, Your left arm out: In, out, in, out. You shake it all about. You do the Hokey Cokey, And you turn around. That's what it's all about!" Each time the verse is sung, a different body part is inserted. In the UK, the dance usually begins with participants putting their left arm in, however, other versions may start with the right leg.

The origins of the term 'Hokey Cokey' remain obscure, although some people suggest it comes from the Biblical Latin phrase "Hoc est corpus meum" meaning "This is My body". The origins of 'Hokey Pokey' are also uncertain. In New Zealand, the dance is known as the 'Hokey Cokey' because 'Hokey Pokey' is a term for honeycomb toffee.

More Info: en.m.wikipedia.org