Mischief Mis"chief (m[i^]s"ch[i^]f), n. [OE. meschef bad result, OF. meschief; pref. mes- (L. minus less) + chief end, head, F. chef chief. See Minus, and Chief.]
[1913 Webster]
1. Harm; damage; esp., disarrangement of order; trouble or vexation caused by human agency or by some living being, intentionally or not; often, calamity, mishap; trivial evil caused by thoughtlessness, or in sport. --Chaucer.
[1913 Webster]

For reasons unknown to me, a relatively young site full of mischief dropped out of the blogosphere, and a relatively old site full of mischief dropped back in.