The Abominable-inator was a device made by Heinz Doofenshmirtz, which would turn everything it hit "bigger, scarier, and hairier", as stated by Dr. Doofenshmirtz. It got used in For Your Ice Only by Dr. Doofenshmirtz to make himself more like The Abominable Snowman, so he could look more intimidating. It got used on Perry the Platypus' trap (which in the process freed him) and Dr. Doofenshmirtz. Also, before it got destroyed by falling off a cliff, it fired at an Ice Remover, making it giant and hairy.
The giant scarf on the inator is a reference to the Fourth Doctor from Doctor Who.