liar phil Share definition Flag A boy named Phil who tends to be of the lying type. Also tends to indulge in filet o' fishes as much as possible. Oh look Liar Phil eating all the Filet O' Fishes again liar phil by swag money cash money December 6, 2018 0 0 Get merch Get the liar phil mug. Buy Now — $32.95 See more merch