An optional ending to a long trail of '!'s and '1's, indicating extreme exclamation in informal typed conversation (e.g., IMs). Sometimes accompanies leet, and often used sarcastically.
I WILL HAXXOR YOU!!!!!!!!!!!!1111111ONEONEONEELEVEN

we got an ice cream vending machine in the break room omfgbbq!!!!!111111111oneoneoneeleven
by Wapt February 28, 2009
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