g.b.s.
It stands for greasy bum sex, but when you ask someone whether they like G.B.S., they don't know that. You should not tell them this until they have openly said that they like G.B.S. in front of many people. Including their parents, who will be shocked and disappointed at their son's hitherto undiscovered fetish.
written by St*ve Gi*bs, approved by Log

also gay butt sex
Adjective used to describe a bad situation.
"That is one fucking ton of g.b.s." - Charles de Gaulle, on hearing that Maréchal Pétain had signed an armistice with the Nazis, leading to the creation of the Vichy regime.
written by J.*Re*us, approved by Log