cottabus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

cottăbus, i, m., = κότταβος (a social sport consisting in dashing a liquid upon a brazen vessel; v. Lidd. and Scott under κότταβος; hence humorously transf.),

a clap, stroke : ne bubuli in te cottabi crebri crepent, Plaut. Trin. 4, 3, 4.