From Longman Dictionary of Contemporary Englishlost soullost soulCONFUSEDsomeone who does not seem to know where they are or what to do – often used humorously → lost
Examples from the Corpus
lost soul• Also patron of infants and lost souls.• How long had I been wandering about Warsaw like a lost soul?• The howling wind outside sounded like the wailing of lost souls.• Also patron of lost souls and mariners.• Those lost souls are so impoverished that they shave their heads in order that they may rub alcohol into them.• Ralph could hear himself telling this story to some lost soul in a diner.• There were some poor lost souls last week at the Ordnance Survey office in Chester.• And Sam Spiro - he had been like a lost soul since his wife died. 