Definition of "flickery"

In the way of small towns, Tom’s ex-girlfriend Sarah (Jaime King), is now married to his former best friend and current town sheriff […] though her eyes still do this weird, flickery thing whenever she looks at Tom.

2009 January 17, Jeannette Catsoulis, “Watch Out for That Pickax; It’s Hurtling From the Screen”, in New York Times‎