The Bam Bam Bam first originated when one of my friends forgot that you cut poo up in a clean snip and did it to aggresively, therfore making the noice Bam Bam Bam as he attacked his poo in an animal like fashion . Bam Bam Bam is now used in the context when something is good, someone just made a dick of themselves, or the most common one, when you want to give someone a quick spider-monkey!!
Me : Dude did you just see that babe over there?
Sean : No, was she hot?
Me : Hell yeah dude, i would give her a quick spider-monkey, Bam Bam Bam!!