'Flacker' definitions:

Definition of 'Flacker'

From: GCIDE

Flacker \Flack"er\, v. i. [OE. flakeren, fr. flacken to move quickly to and fro; cf. icel. flakka to rove about, AS. flacor fluttering, flying, G. flackern to flare, flicker.] To flutter, as a bird. [Prov. Eng.] --Grose. [1913 Webster]