What was the dunbugie in first transformers movie?

You're likely thinking of the "Dune Buggy", not "dunbugie," which is a modified Volkswagen Beetle that appears in the first Transformers movie (2007).

The Dune Buggy is a vehicle that transforms into the Autobot scout Bumblebee. It's a memorable part of the movie, particularly for its transformation sequence and its role in the final battle.