A less than desirable female. This term is derived from the freshwater fish Lota lota, also known as a Burbot. A female who is termed a "Burbot" is much like the fish in that they are slimy, smelly bottom feeders that will put anything into their mouth.
Any automated program which does annoying things by design. Can be used to refer to a malfunctioning program, but this is not generally correct. Often used on chatrooms like IRC. Not to be confused with buttbutt.
"that program is a buttbot" - "the anti-spam program has buttbotted" - "the buttbot is on again"