Search the lexicon

Found:

Flap

PHONOLOGY/PHONETICS: a sound articulated in such a way that one articulator, usually the tongue tip, is drawn back and then allowed to strike against another articulator in returning to its rest position (cf. Ladefoged (1975)) EXAMPLE: in American English /r/ in mirror or /t/ in dirty are often flaps.
LIT. Ladefoged (1975)