Slim

Slim is a cinnamon brown stick insect and a clown in P.T. Flea's circus troupe. It appears that he is unhappy with his position at the circus troupe, as his boss constantly casts him as a prop instead of a character, with such castings such as a broom, a pole, a stick and a splinter. He is shown to be best friends with Heimlich and Francis, and often treats other bugs with more respect in contrast to Francis' aggressive nature. Unlike most stick insects, Slim does not have wings and cannot fly. Because of this, Francis usually carries him for transport. However, Francis, while chasing Hopper who kidnapped Flik in retribution for the ant rebellion, accidentally loses Slim in a branch group. At the end of the film, when the circus bugs leave Ant Island, Slim rides on the back of the circus wagon since Francis helps Manny carry Heimlich.

Personality
Slim is very nervous and erratic, and is usually reprimanded by P.T. Flea. Apparently, he is unhappy with his position at the circus troupe, as his boss constantly casts him as a prop instead of an actual character, with such castings such as a broom, a pole, a stick and a splinter. He is best friends with Heimlich and Francis, and seems to be tolerant of Francis' aggressive nature. Unlike most stick insects, Slim does not have wings and cannot fly. Because of this, Francis usually carries him for transport.

Trivia

 * In an outtake, Slim is being carried by Francis and he accidently swallows a bug.
 * Slim's voice actor David Hyde Pierce also provides the voice of Dr. Delbert Doppler in Treasure Planet.
 * Slim appears in the end credits of Cars as a brown car with big mirrors.
 * Slim's line, "How low can you go?" is later used by one of the Barbie dolls in the next film, Toy Story 2.
 * His name resembled to an evil clown from Killer Klown from Outer Space