A abnormally mean or rude person. It's a shortening of the phrase "totally bad".
"That jerk is a toba!!"
Short for "Manitoba", one of the five "forgotten provinces" of Canada (others being PEI, Newfoundland, Saskatchewan and Nova Scotia). It can be used as a noun or adjective.
"I went back to Toba, my motherland, for the summer to visit my mennonite cousins. Still nothing there but moose and goths. But at least they have booze and I got totally shit-plastered."