"BAM" is used as an expression when something is going well.
Like, "I went into that meeting and nailed my pitch like BAM!" or "I was looking for my keys and BAM, there they were!" 
Or our personal favourite: "I was wearing my BAM BAM T-shirt, brewing some BAM BAM coffee and the day was just perfect, like BAM!" 

So get your affirmations on and wear some BAM (BAM)! 

Tim is wearing a size XL of 100% recycled fabric.