bot 1
/bot/ , n.
the larva of a botfly.
Also, bott .
[ 1425-75; late ME; akin to D bot, Fris dial. botten (pl.); further orig. obscure ]
bot 2
/bot/ , n. Australian Slang.
a person who cadges; scrounger.
[ 1915-20; perh. shortening of BOTFLY ]
bot 3
/bot/ , n.
a device or piece of software that can execute commands or perform routine tasks, as electronic searches, usually without user intervention (often used in combination): intelligent infobots; shopping bots.
[ 1985-90; shortening of ROBOT ]