The powerclipper is usually not self-aware enough to use this in an ironic reflexive form, i.e. "I powerclipped senior management so they know how great I am"
Antonym: Powershedding - The emailer sees no need to cc'd everyone on the list so emails directly to the appropriate party. The emailer will usually exhibit high self-esteem.
Verb: "Geez, he powerclipped me in on this banality; it's way below my pay grade"
Ann: "Why did I get this email from Bill?"
Colin: "He's powerclipping his way to the top."