Tutonium

Tutonium is a metal of dubious origin from the cartoon portion of the Generation 1 continuity family.

Supposedly, tutonium is a metal used in producing Transformer bodies.

Or it's just some random garble from Megatron, who knows?

Fiction

The Transformers cartoon

Megatron threatened to melt Swindle down for scrap tutonium if ever he'd do something stupid like selling his teammates again. B.O.T.