Pushover

wiktionary

ref

push +‎  over; US 1906 of things, 1926 of people (bad boxers and easy women), [1] popularized by Jack Conway of Variety.

etymonline

ref

pushover (n.)

also push-over, "something easily done or overcome," 1900 of jobs or tasks; 1922 of persons (incompetent boxers and easy women), from the verbal phrase; see push (v.) + over (adv.).