adj. and noun:
An outrageous insult directed towards someone who is grotesquely ugly. In more specific circumstances, this has been known to have been shouted towards someone who is in a wheelchair (either for permanent disablilty reasons or even just temporary injury).
Generally can be used as a derogative word!
1)Oi! Look at that girl, she's got troll!
2)"Who? you mean that spazzy Trolly thing, sitting over there