2. diesel locomotive (in North America);there is also a calf...a diesel locomotive without the "diesel", its merely a lower, more-squat locomotive, no cab, no diesel, just the electric traction motors. The cow has the disel engine(s) so called the prime mover, as well as the electric traction motors which drive the wheels. Occasionally the term slug is used in place of calf; the slug has the electric traction motors, is squat, with no cab, no diesel engine(s).
2. A term for a nasty, stupid, and/or promiscuous person (usually female), despite that cows are cute and relatively intelligent animals.