Greg: Well yeah, either that or I threaten to sign on, and lo the cheque doth commeth in the post.
"Sign on". This term is slang; it is used to describe the way in which unemployed people in the United Kingdom can receive state benefits. To claim the money to which you are entitled, you must visit the benefit office and sigh the appropriate form. The money you receive can then be spent on lager, gambling video games or various narcotics. You could even spend it on food or medicine.