[choreographer] Nadine `Hi-Hat` Ruffin is a choreographer of hip-hop dance from New York City. Ruffin has worked with Montell Jordan, Big Time Rush, Teddy Riley, P-Diddy, Wyclef, Shakira, Rihanna, Mary J. Blige, Eve, and Jay-Z. Ruffin`s work is featured in many Missy Elliott music videos, such as `All n My Grill`, `She`s a Bitch`, `Hit Em w...
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http://en.wikipedia.org/wiki/Hi-Hat_(choreographer)
[instrument] A hi-hat, also spelled hihat, is a type of cymbal and stand used as a typical part of a drum kit by percussionists in rhythm and blues, hip-hop, disco, jazz, metal, rock and roll, house, reggae and other forms of contemporary popular music. It is a standard part of the modern drum kit. The hi-hat consists of two cymbals that ar...
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http://en.wikipedia.org/wiki/Hi-hat_(instrument)

High-hats are cymbals arranged in a specific manner. Two cymbals are placed on a stand horizontally. The lower cymbal is stationary and attached to the stand while the upper cymbal is moveable and attached to a spindle that runs through the body of the stand. As the pedal is depressed, the top portion of the high-hat comes together with the lower p...
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http://www.bbc.co.uk/radio2/soldonsong/glossary/h.shtml

Instrument used as part of a drum kit consisting of a stand, rod, pedal, and 2 cymbals, one on top of the other. As the pedal is raised or lowered it causes the rod running through the stand to raise the top cymbal. Creating different tones as it is struck.
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http://www.songstuff.com/glossary/H

This is a square of plywood with a bracket attached, to which a tripod head may be added (or is sometimes permanently affixed) used for filming with the camera very low to the ground. Its name is a bit of a contradiction, to its use nowadays, but it used to be that a Hi Hat was for shooting from very high up, with the plywood board being mounted up...
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https://www.encyclo.co.uk/local/21112

a pair of foot-operated cymbals that's part of a drum kit - Drummers play bass drum with one foot and hi-hat with the other.
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https://www.englishclub.com/vocabulary/music-vocabulary.htm
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