1. The act of someone trying too hard to be a troll.
2. Someone going out of their way to be a prick to someone else.
3. A variation of the word "Tryhard" where in this insatnce, one is trying too hard to be an asshole.
Hey, i noticed you're wearing blue socks... I hate you, you fat, ugly worthless shit face kid!
Wow, your such a trollhard! Your wearing blue socks too!