a plug stopping the upper end of a pipe, as a recorder or a whistle, and having a narrow slit through which the player blows.
Origin: 1620–30; perh. special use of dial. fipple loose lower lip, pouting lip; cf. ON flipi lower lip of a horse, Norw flipe flap, lappet. See flip1, flap, flabby
A whistlelike mouthpiece for certain wind instruments, such as a recorder or flageolet, that channels the breath toward the sounding edge of a side opening.