v. Obs. Also 8 flirk. [Onomatopœic; cf. flick, flirt, jerk.] intr. To make a jerking movement. Hence Flerk sb., a jerk. Flerking ppl. a., jerking, twitching.
1606. Sylvester, Du Bartas, II. iv. Tropheis, 348.
| With sudden flerk the fatall hemp lets goe | |
| The humming Flint, which with a deadly blow | |
| Pierct instantly the Pagans ghastly Front, | |
| As deep as Pistol-shot in boord is wont. | 
c. 1620. Z. Boyd, Zions Flowers (1855), 134.
| With sudden flerk the hempe Ile nowe let goe, | |
| The humming flint him gives a deadly blo. | 
1710. Lond. Gaz., No. 4768/4. Stolen Cart Mare Saddle Backed, and a flirking Tail.