This is when you have sex with a woman who is on her period. You then grab her by her ankles and drag her back and fourth across the sheets making red strips that resemble the american flag.
Damn, I bangedKristen last night on her period and then did a Betsy Ross.
A girl who knows full well a guy is likely to cheat, hurt her and be an inconsistent loose cannon, yet instists on trying to 'fix' him under a narcissistic and twisted delusion that she's just the special girl out of everyone that's tried to effectively 'Tame the Incredible Hulk'
"She's still with him after he cheated 3 times and everyone around them warned her about him? She must have Betty Ross Syndrome."