Sentence:  When Nix got sick, he didn't feel like other people felt. He didn't get sluggish or throw up. He buzzed. It wasn't anything someone could hear, just an intense humming that sizzled all over. His sister couldn't hear it, but she could tell just by looking at him. The <WSD>buzzies</WSD> are back. 
Meaning of the word marked with <WSD> tags:  Anything that produces a buzzing sensation.