A world renowned insult, developed in East London. Used in most conversations. It's origin derived from a woman who gave birth to a strangly gay son called Gary. His mum herself has been insulted on numerous occasions and has been known to be called a MILF, Cougar, cow, Pink Panthers left testicle e.t.c.
From post-latin origin: Garrius Madreus - "very loose woman who is mother of Gary the queer"
Person A : Where were you last night?
Person B: I was at Gary's Mums House
Gary: Shut up you fuckrag
Person B: Your mum Gary
Person A: Yeah Gary, lets spend some time in your mum. Everyone else has.