† arse-pushn.Obsoleterare a heavy fall on to the buttocks; cf. arse-possn.
ΘΚΠ
the world > movement > motion in a certain direction > downward motion > falling > [noun] > falling down or from erect position (animates) > on buttocks
arse-push1660
pratfall1903
1660 J. HowellLex. Tetraglotton Dict. (at cited word) That hath an arse-push, or fall on his arse.