Slag (slang)

Slag (not to be confused with the Dinobot) is a exclamation sometimes used by Transformers. It was most avidly used in Beast Wars. Depth Charge used it in pretty well every conversation he had, because he's a badass.

It may be a kind of cussin', but it's hard to say.

From Teletraan I: The Transformers Wiki, a Wikia wiki.