n.
a sudden stop.
1884. Rolf Boldrewood, `Melbourne Memories,' c. xvi. p. 115:
«The `touchy' mare gave so sudden a `prop,' accompanied by adesperate plunge, that he was thrown.»
·noun A shell, used as a die. ·see <<Props>>. II. Prop ·v That which sustains an incumbent weight; ...
Webster's Dictionary of the English Language