Psychobilly is a fusion genre of rock music that mixes elements of punk rock, rock and roll, rockabilly, and rhythm and blues. It is one of several subgenres of rockabilly which also include thrashabilly, punkabilly, surfabilly and gothabilly. Merriam-Webster defines it as "music that blends punk rock and rockabilly"; another dictionary defines it as "loud frantic rockabilly music." About.com defines psychobilly as "tak[ing] the traditional countrified rock style known as rockabilly, ramp[ing] up its speed to a sweaty pace, and combin[ing] it with punk rock and imagery lifted from horror films and late-night sci-fi schlock,...[creating a] gritty honky tonk punk rock." Psychobilly, "while rooted in the twang of rockabilly, owes just as much to the sound of straight up three-chord punk, often with a dose of thrash metal."