"MacGruber" **½ (R; 1:30) • Will Forte squeezes silly if often tasteless laughs from his "Saturday Night Live" skit about an arrogant-but-incompetent bomb defuser. Kristen Wiig is the songbird ...

MacGruber was conceived as a send-up of Richard Dean Anderson's MacGyver, the rugged, stone-faced TV action man who could perform amazing feats of science, often with little more than a Swiss army ...