When you go to the print or copy room of a business, and the staff are all lounging on the floor, hammered drunk, pissed outta their minds, just like Paul McGrath, then that area is known as a 'Grathser copycentre'.
You: Dessie can I have 3 reams for our printer?
Dessie: Ah go and ask me bollix ya bald hoor.
Yo: This is such a flamin' Grathser copycentre.
Noun, derived from graphic + stick
Graphical residue on a computer screen, due to overloading M$ Windows(no not linux, amiga workbench or even Etch-a-sketch!). Where the computer is unable to draw the new windows properly, and a multitude of windows stick across the screen.