"Bump" is referring to bumping your ad to the top of the list in a specific thread secrion.
By the way, welcome to the forum. Stop by the Introduction thread and let everyone know your here.
k4h, when you reply to a thread here it "bumps" the thread to the top. Lotsa "bumps" means it's been here a while. If you are interested, Private Message me with your offer and I'll consider it. P