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this is the act of a girl riding on top of her partners dick while she is on her period. At some point all her menstration makes its way down to the nutt sack and becomes covered in blood, which is called the flaming bat wing because it very red and bloody, not to mention veiny.
Hey man that bitch was wearing it out on top when i noticed she had given me the flaming bat wing.
by EazyBeazy February 21, 2011
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