Foolish, inane.
Of a poker player: playing in an overly cautious and reactive manner.
detailed or specific; fastidious, fussy, nit-picky.
A dope fiend, a druggie.
dulled or intentionally blunt.
out of focus; blurry.
To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.