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.
by boner75 June 20, 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.
by thefatman123456 June 20, 2009