Source : WordNet®

teflon
     adj : not to be trusted; "how extraordinarily slippery a liar the
           camera is"- James Agee; "they called Reagan the teflon
           president because mud never stuck to him" [syn: {slippery},
            {tricky}]
     n : a material used to coat cooking utensils and in industrial
         applications where sticking is to be avoided [syn: {polytetrafluoroethylene}]