Yip Yips

The Yip Yips are characters on the popular American children's television show Sesame Street. They are interplanetary visitors, from the planet Mars. These creatures, with squid-like tentacles, large eyes, and antennae, materialize into a room and say, "Yip-yip-yip-yip. . . Uh-huh. Uh-huh", in monotone voices.