To slack off with many people at the same time.
I'm not done with that yet; I've been multislacking.
One who engages in several slacker activities simultaneously.
I've been sipping lattes, facebooking, creating online wishlists and submitting words to urbandictionary.com all morning. I'm such a multislacker.
To be slack in several ways, against several people, more several reasons.
Public schools are so multislack.
"doing a whole lotta nothing at once simultaneously,with no major point or goal"
Man bob was gaming,smokin,on the phone an watchin tv all at once,he was totally multislacking
Having several jobs you rarely show up for...
He made his fortune multislacking...and never showed up!