internet poo Share definition Flag when you need to do break away from being on the internet to use the toilet and go for a poo. If chatting to someone on MSN you may say to them 'BRB just going for an internet poo@' or BRB just off for an interpoo' internet poo by ian j taylor January 29, 2007 0 0 Get merch Get the internet poo mug. Buy Now — $32.95 See more merch