The most annoying thing imaginable. Especially if followed by the number one.
Also very uncool. In fact perhaps the opposite of cool.
"Oh god... that guy is such a Xalder1... He just never shuts up."
by A penis. November 19, 2012
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Holy shit that guys charisma is Xalder-like.

You have to try this new game! It's like Xalder!
by Xalder November 22, 2012
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