1) The act of being in the seated position as if seated in a chair only without an actual chair. Usually an impossible kung
fu maneuver seen in movies by expert martial artists.
2) The act when a girl is riding a
guy top side, then shifts her feet forward and bounces as if getting up and down from a chair repeatedly. Typically, this speeds up the climax time for the
guy, leading to less satisfaction by the
female, unless the sex is horrible and she just wants it to end, then she can chair the
guy and that would mean she is chairing him.