An "infinitely small" "flick" or "strike" of a finger(s), used to articulate melody notes in bagpipe music. In written notation, they appear as very small 32nd notes, with the flag pointed upwards.
A four-step embellishment (synonymous with the "Bubbly Note"). Steps: Coming from B or C, (1) Play Low G, (2) D Gracenote on Low G, (3) C Gracenote on Low G, (4) Play B. Click link for details.