have a sixpenny bit up one's backside verb1 •(slang, old-fashioned) To be over the moon, to be very happy.‘Eddie told me what you done […] Come in here earlier on like he’d got a sixpenny-bit up his backside.’ — 1980 formshad a sixpenny bit up one's backside · having a sixpenny bit up one's backside · has a sixpenny bit up one's backside
