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1.
IBP
When a poster submits a post and another poster posts saying the she is "In Before Poll." Also, just post whoring sometimes.

This is most common with the many vBulletin forums since they have you post, then create a poll after you submit the thread.
Thread
"Hey guys, do you like cookies, pick an option!!!"

Poster2: "IBP"
by Daniel Stanley August 08, 2005
 
2.
IBP
International Bullshit Program
ISP has lots of IBP courses
by DJ Biceps March 28, 2007
 
3.
IBP
Invision Power Boards.

Software that drives many popular forums.
<h4x0rd00t123> Yo what kind of forum was that
<s8k0r_boi69> IBP
<h4x0rd00t123> Can I hack that shit
<s8k0r_boi69> no lol wtf
by brahm2 September 28, 2003