streaky(s = adj.all) streaked - marked with or as if with stripes or linear discolorations; "streaked hair"; "fat legs and dirty streaky faces"
Derived form noun streak₃

   Same as Streaked, 1. Cowper. [1913 Webster]

streaky, adj. (streakier, streakiest)
1 full of streaks.
2 (of bacon) with alternate streaks of fat and lean.

Derivative:
streakily adv. streakiness n.