Tom o'Bedlam
noun
Tom o'Bed·lam
-əˈbedləm
plural Tom o'Bedlams
: a wandering mendicant either mad or feigning to be so : bedlamite
Word History
Etymology
Tom (nickname for Thomas) + o' + Bedlam, popular name for the Hospital of St. Mary of Bethlehem, London, England, an insane asylum