Overview. Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by intense fatigue that cannot be cured with sleep. Mental and physical activities may cause your symptoms to worsen. When your fatigue cannot be linked to a specific cause, your doctor might classify your condition as CFS.
The boycott may be a form of reprisalâthat is, retaliatory measures against illegal actions on the part of a state. The USSR has used the boycott in response to actions by reactionary governments of capitalist countries.
noun. verb. A crowd says boo to the performance. A crowd says boo to the performance. The definition of boo is a way to show disapproval, or to scare or surprise someone. 1  An example of boo is to what a man said when the speaker said something he thought was shameful. 2  An example of boo is what a child says when they jump out from a hiding place.