1. (v.) To repeatedly and pointlessly spam a group of people in a network with information that they already have.
2. (n.) A spam campaign to a group of recipients within a network with information they already have.
1. "I'm going to zalewski the hell out of this memo."
"Man, I got zalewskied something fierce the other day."
2. "Don't pull a zalewski, or they'll come after you with pitchforks and torches."