When two members of an internet forum post the same or very similiar responses to a thread at the same time. The poster whose response appears first is the fasposter, and the poster whose response appears second has been fastposted.
{Original Poster @ 2:15pm posts} GWB is a great prez.
{You @ 2:22pm post} GFY
{Other member @ 2:22pm posts} Go F*ck yourself!!

You have fastposted this member.
by BillyTheKid September 20, 2006

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