Trevor, voiced by Andrew Barclay, is a small, grey bulldog. He is foul-mouthed, irritable, extremely perverted and spends most of his time eating and masturbating. He has a large collection of hardcore pornography and is often seen humping items of furniture. He can be rather intelligent and eloquent at times, but does not take these traits seriously, being more content in engaging in other very crude activities, including drinking out of the toilet with a curly straw and smearing the walls with his own faeces. He speaks in a gruff Cockney accent. He has no sense of hygiene and has had the same two tapeworms in his stomach since the late 1970s. The worms, also voiced by Barclay and Luff, converse about a wide range of subjects, from ABBA to the Kennedy assassination.