Abraham man
/ˈeɪbrəham ˌman/(also Abram man) Now historical
noun
A beggar claiming to have been released on licence from the Hospital of St Mary of Bethlehem in London, or any similar institution; (more generally) any vagabond or petty criminal who feigns insanity, especially in order to obtain money by begging.
Origin
Mid 16th century; earliest use found in Thomas Harman (fl. 1547–1567), writer on vagabonds. From the personal name Abraham + man.