The word "bah" differs from other popular internet shorthand such as "lol" because it is not an accronym, but rather a word that sounds like it is spelled.
Gearoid: "Flying through the Pokémon episodes bah." ( Gearoid informs his friend that he is watching Pokémon episodes and is possibly bored out of his proverbial tree.)
Shane: "Fair love me friends bah." ( Here, Shane uses the word to emphasize how much he loves his friends. )
Philip: "Well bah." ( A common greeting between the exponents of bah. Conversations like this are notorious for their length and content. )