Dreydlekh (plural of "dreidel") or "spins" are musical ornaments of klezmer music, particularly violin, used to produce its characteristic "tear in the voice" sound.[1]
The main dreydlekh are glitshn (glissandos), krekhtsn ("sobs", "wails"), kneytshn ("wrinkles"), tshoks (a kind of bent notes of cackle-like sound), and flageolets. [1]