Paint the chest of the unitard with yellow fabric paint. The yellow section should create a "V" that comes to a point at the bottom of the chest.
Paint the ends of the sleeves and legs yellow. Paint about 6 inches of the sleeves and 9 inches of the legs.
Paint brown dots onto the yellow parts to resemble leopard spots.
Cut a piece of the fur fabric that will drape around the shoulders and meet at the point of the bottom of the chest. If you want to make the fur look even wilder, add some black streaks through the fur with a small amount of black fabric paint.
Apply fabric glue to the fur fabric and glue it to the unitard so it frames the yellow spotted section on the chest. Apply glue to a small bit of the fur at a time so you can get it lined up before the glue dries.
Cut a strip of leopard fabric or a piece of the leopard scarf and tie it around your leg, just above the knee.
Accessorize the costume with rock-star-inspired fingerless gloves, boots, a spiked collar and studded belt.
Tuck a 2- to 3-ft. section of the leopard fabric into the back of the belt to make the tail.
Apply white makeup with small black dots above the upper lip to resemble a cat's mouth.
Add yellow and black stripes that extend from the hairline onto the face.
Tease your hair so it is wild and sticks straight out like a mane. Color your hair with temporary colored hairsprays to match the fur fabric, if you wish.
Wear a set of fake ears attached to a headband if you can find them, but the costume will still resemble Rum Tum Tugger without them.