1580s (intransitive) "to move, stir, change position, give way a little;" 1590s (transitive) "change the position of;" from French bougier "to move, stir" (Modern French bouger), from Vulgar Latin *bullicare "to bubble, boil" (hence, "to be in motion"), from Latin bullire "to boil" (see boil (v.)). Compare Spanish bullir "to move about, bustle;" Portuguese bulir "to move a thing from its place." In 16c. canting slang, "a general verb of action, usually stealthy action" (Farmer, "Musa Pedestris," who gives among his examples budge a beak "to give the constable the slip," budge out or off "to sneak off"). Related: Budged; budging.