The act of having sex on top of a piano, typically the large, grand piano type.
Guy 1: (looking at Hot Girl on stage) "I'd really like to F Major her!"
Guy 2: "Yea I know, there's a piano right there too!"
by Motzart February 21, 2012
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A key in which music is played. The key signature consists of one flat

F G A Bb C D E F

Tonic Chord:
This Bach chorale is in the key of F Major
by clarinetman April 24, 2008
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A Key in which music is played, consisting of one sharp or flat.
F major scale:

1 2 3 4 6 5 7 8
F G A Bb C D E F
by Levi Morris June 25, 2006
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