Poisonous blue-and-black frog. (Ignore that bumblebee-esque frog, I got that pic from wikipoodia. And yes, I called Wikipedia that. I don't like that wiki)
His frog tongue is his flail/mace in robot mode.
Unknown. (Pun unintended, also pseudo-intended as he was a TNB Character.)
Behind the Scenes: Edit
His name originates from both Slapper and Spittor, two Decepticon toads. He also keeps his altmode, unlike somebody.