A whole bunch of; an array; a bunch
"When she disrupted the cave, a whole knipsy rusle of bats came flying towards her."
"After he ate the greasy food and touched his face, a whole knipsy rustle of pimples arose."
To rustle (subject)’s feathers is to get under their skin to the point of annoyance, where anger directed or misdirected is taken out on the Rustler, friends, or family.
Nick: You know, you (start rustling subject)...
Kenji: God dammt! (Response rant). Why you gotta start shit like that?
Nick: Calm bro, just try to rustle feathers!