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1.
A term used when a harpist uses the A sharp and D sharp pedals on their instrument. This position is when the harpist's legs are most widely apart.

If a harpist keeps their legs in the A# D# position for longer than necessary, it can look very sexually suggestive. It is therefore the harping equivalent of a 'Y shaped coffin'.

Can also be abbreviated to 'A# D#', as well as 'A sharp D sharp position' and 'A sharp D sharp'
"Ew, look at that harpist, she's totally A# D#"

"I'm sorry, but the A# D# position just doesn't work with guys'
by Nopseudonymisgoodenoughforme April 18, 2011