Usually one junkie baits the other into violent reaction so that he can claim damages in court by saying "Ya fuckin' bam". However, there is actually no space inbetween each word when a junkie uses it. Infact, the faster you can say "Yafuckinbam" the more powerful junkie you are.
Junkie 2: "Wit, yafuckindafty?"
Junkie 1: "Wit, ya bam?
Junkie 2: "Who you callin' a bam, ya dafty?"
Junkie 1: "Who you callin' a dafty, ya bam?"
Junkie 2: *brandishes knife*
Generally heard from the mouths of Neds accosting some other neds or worse, some poor innocent normal youth who doesn't aim to be on a Daytime TV chat show by the time they're 25.
If a Ned refers to you as 'a pure wee bam' then run. The buckie's gonnie get ye
'Pure bunch of bams'
Player A typed "BAM" after flopping a full house and wiping the floor with the opposition. Generally used when one is worthy of self-congratulation.