Jimmy
来自Big Physics
early 19th century: pet form of the given name James (compare with jack1).
wiktionary
Jim + -y
etymonline
jimmy (n.)
"burglar's crowbar," 1848, variant of jemmy, name for a type of crowbar much used by burglars, special use of Jemmy, familiar form of proper name James (compare the mechanical uses of jack (n.)).
jimmy (v.)
"pry open with short leverage," 1893, from jimmy (n.). Related: Jimmied; jimmying.