What is Bump mean?

[kien]

Originally Posted by xtreme

and it stands for Bring Up My Post.

Yes, it has been suggested that 'bump' is an acronym of Bring Up My Post however this is almost certainly a backronym and the usage is entirely consistent with the verb "bump" which means "To knock to a new position". [wikipedia]

oh, and

[Midknight]

Other options are ...

ttt = To The Top.