Definition - What does Proggy mean?
“Proggy” is a slang term and IT that is often just used to refer to a program. It has been part of IT slang for a long time, especially in the United Kingdom.
Techopedia explains Proggy
Someone might refer to a “proggy” while talking about creating, modifying or using a program. For example, someone might say “check out this proggy and what it does” or, in discussing theoretical functionality, “we’ll come up with a good little proggy for that.” Sometimes there is the implication that the proggy is made up of smaller parts or modules, or that it is a full application, rather than a partial piece of source code. “Proggy” can also be used to describe a set of programming fonts that are often used in Windows, Apple and UNIX operating systems. In addition, the term may be used as a placeholder or variable name in code.