The broken chair refers to sweeping a woman's arms out from underneath her while doing it doggy style.
Girl-I got a bloody nose last night because during the middle of sex, my boyfriend pulled the broken chair on me.
ayon kay boner75 ika-20 ng Hunyo, 2009
A sexual position in which the couple is going at it doggy style and than the male sweeps out one of the females arms causing her to fall over much like a chair with a broken leg.
"Everything was going smooth that night until Jimmy tried a broken chair."
ayon kay thefatman123456 ika-20 ng Hunyo, 2009