Barb

barb [ bahrb ]
[ noun, transitive verb ]

MEANING :
1. (n.) a pointed part projecting backward from a main point, like a fishhook or arrowhead
2. (n.) an unpleasant or caustic remark
3. (tr. v.) to provide with a barb

USAGE EXAMPLE 1 :
He erected a fence of barbed wire around his property.

USAGE EXAMPLE 2 :
Craig Brown is the foremost British satirist of his generation. From the Archbishop of Canterbury to Victoria Beckham, no one is safe from the barbs of his comedy.