Grrrrrrrrrrr!! is a 1965 oil and Magna on canvas painting by Roy Lichtenstein. Measuring 68 in × 56.125 in, it was bequeathed to the Solomon R. Guggenheim Museum collection from Lichtenstein's estate. It depicts a head-on representation of an angry dog growling with the onomatopoeic expression "Grrrrrrrrrrr!!". The work was derived from Our Fighting Forces, which also served as the source for other military dog paintwork by Lichtenstein.