What does "bump" mean in a thread?

[pepper123]

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wow no one saw that coming

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Yeah even I resisted the urge to take a swing at that softball.

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my comment was light hearted tuq, you didn't have to go THAT far....

[iron81]

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<marquee>bump</marquee>

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FYP

[holdme]

[img]/images/graemlins/cool.gif[/img]

[mcpst17]

cool thx all

[ZeTurd]

Pretty sure the ninjabumper just jizzed on himself.