snipe at

Webster's Dictionary (GCIDE)

Snipe \Snipe\, v. i. [imp. & p. p. Sniped; p. pr. & vb. n. Sniping.]

1.To shoot or hunt snipe. [Webster 1913 Suppl.]

2.To shoot at detached men of an enemy's forces at long range, esp. when not in action; -- often with at. [Webster 1913 Suppl.]

snipe at, to aim petty or snide criticisms at (a person) in his absence. [PJC]