English▸ noun
(plural wallies)
British English informal, derogatory a silly or inept person: I must have looked a total wally but I didn't care.
– ORIGIN 1960s: perhaps a shortened form of the given name Walter. There are many theories of the origin: one story tells of a Wally who became separated from companions at a 1960s pop festival; the name, announced many times over a loudspeaker, was taken up as a chant by the crowd.