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1.
a sexual act in which a man humps a woman's leg while his penis is in an erect state while wearing clothes; dry humping of the leg; to perform such an act; sometimes abbreviated as SBA.
"The date was going okay until we started making out and he totally Susan B. Anthonied me!"

"If I never get another Susan B. Anthony it will be too soon!"
by Megan Reid July 30, 2006
 
2.
When your fucking what you think is a woman, comes out and says im a man.
Dude i fucked a man.. Turns out susan used to be anthony.
(Susan B Anthony)
by NIKNAK10 October 18, 2010
 
3.
An interjection. Can be used in almost any circumstance.
Bill: Dude! That goat totally just broke your window with its horns!
Fred: Ah! Susan B. Anthony! I can't believe the nerve of that goat. I hope geico covers goat attacks.
by curlyhairedkid July 11, 2009
 
4.
A saying this crazy hot chick in Austin made up. But now she uses it all the time, and won't shut up! It's SBA this, SBA that!
Megan: "dude, this guy i hooked up with last night totally SBA'd the fuck out of my leg. I had to shake him off, like a dog. My thigh is actually sore today!"

Cati: "that's awesome, how come no one ever want's to Susan B. Anthony my leg?"
by dave march August 02, 2006
 
5.
Something this weird chick from Austin made up, and now she uses it ALL the time b/c she thinks it's cool or whatever.
Megan: "dude, this guy i hooked up with last night totally started Susan B. Anthoning my leg. I had to shake him off, like a dog."

Cati: "that's awesome, how come no one ever want's to Susan B. Anthony my leg?"

Megan: "cause you're tall, of course."
by David March August 01, 2006