noun, plural trol·leys.
verb (used with or without object), trol·leyed, trol·ley·ing.
- in a confused mental state.
- insane: He's been off his trolley for years, but his family refuses to have him committed.
Origin of trolley
- mentally confused or disorganized
Word Origin for trolley
1823, in Suffolk dialect, "a cart," especially one with wheels flanged for running on a track (1858), probably from troll (v.) in the sense of "to roll." Sense transferred to "pulley to convey current to a streetcar motor" (1890), then "streetcar drawing power by a trolley" (1891).
see off one's head (trolley).