romper

Etymology 1

romp + -er

noun

1. Someone who romps or frolics.
2. (nautical) A ship that has moved far ahead of a convoy; see also straggler.

Etymology 2

Ellipsis of romper suit.

noun

1. A onesie.
   Prompted to pose on her bed, [Tavi Gevinson] dressed in a skimpy romper, “pouting,” she recalled, “with heavily lined eyes and straightened blonde hair.” 2021-05-04, Ruth La Ferla, “On That Bombshell Billie Eilish Cover for British Vogue”, in The New York Times, →ISSN

Etymology 3

From Romper Room, name of a children's television series. See romp.

verb

1. (Ireland, historical, transitive) To abduct (a victim) to a room where they are tortured and murdered.
   James McCartan was about to be ‘rompered’, but not before those present poured themselves drinks. 2003, Martin Dillon, The Trigger Men: Assassins and Terror Bosses in the Ireland Conflict