The long-term girl friend of your future boyfriend. She is generally of moderate attractiveness, intelligence and wit; somewhat 'sporty' and more or less liked by all his friends. Little do they know she is a gummy, boyfriend stealing little twat (see df: twat).

Historical note: original specimens were often found to have prominent orthodontic flaws, giving rise to the use of 'gum'

No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.