The word "spaz" is slang for someone who behaves in an erratic, hyperactive, or clumsy way. It is sometimes used as an insult to mock or make fun of someone who is acting overly energetic or unable to control their movements. Full definition
-- Moi — Creative, artistic, quirky, unconventional, fun, witty, intelligent, well - brought up, well - educated, life - long learner, INFJ personality type, spiritual / intuitive... I possess the gift of spaz — for instance,... (datingforartists.com)
Nothing makes up for being a total spaz like walking into the room with a plate of cookies;). (faring-well.com)
Ganging up on one player, or having one out of control spaz on a team chopping everyone to pieces. (sbnation.com)