n. A strip of any textile material drawn up at one edge in gathers or plaits, and used as a bordering or trimming; a full, narrow flounce; a frill; a ruff.n. Something resembling a ruffle in form or position.n. In ornithology, same as ruff, 2 .n. The string of egg-capsules of the periwinkles, whelks, and related gastropods.n. In mech., a series of projections, often connected by a web, formed on the inner face of a flange of a metal gudgeon for a wooden shaft or roller, and fitted to a corresponding series of recesses in the end of such shaft or roller, to secure a rigid attachment of the flange and prevent its turning except as the shaft or roller turns with it.n. Disquietude or discomposure, as of the mind or temper; annoyance; irritation.To act turbulently or lawlessly; riot; play the bully; hence, to bluster.To put on airs; swagger: often with an indefinite it.To be rough or boisterous: said of the weather.To bully; insult; annoy.n. A brawl; a quarrel; a tumult.n. Milit., a low vibrating beat of the drum, less loud than the roll, and used on certain occasions as a mark of respect.To beat the ruffle on: as, to ruffle a drum.