Pom Pom is a character from the Homestar Runner website. He is round, orange, and sports several short yet equally round and orange appendages. The end result makes him look something like a Bumble Ball.
Pom Pom is originally from the Isle of Pom, where he lived with his 27 girlfriends. Residents of Pom are blessed with extraordinarily high IQ's and skin which can absorb large items (including Pom Pom's trusty Pom Pilot). Poms communicate in a highly sophisticated language, which, to humans, sounds quite similar to blowing bubbles in a glass of milk.
Pom Pom is best friends with Homestar Runner, which is quite beneficial since Homestar's comparitively low IQ is famous for getting him into difficult situations.