Used by males to address a fellow male. Similar to 'Mate' or 'Brother'. Literal meaning (of the originalTamil word) is 'brother-in-law'. Machan (මචං) is quickly becoming the de-facto standard in addressing same age or same rank peers in most social circles, including office environments. In private sector office environments, 'Machan' (මචං) is especially used by senior person to address a subordinate to create (sometimes, false) sense of equity