Swash \Swash\, v. i. [imp. & p. p. {Swashed}; p. pr. & vb. n. {Swashing}.] [Probably of imitative origin; cf. Sw. svasska to splash, and, for sense 3, Sw. svassa to bully, to rodomontade.] 1. To dash or flow noisily, as water; to splash; as, water swashing on a shallow place. 2. To fall violently or noisily. [Obs.] --Holinshed. 3. To bluster; to make a great noise; to vapor or brag.