Lindsay Lohan lindsaysober.jpg

Last night while out and about with Sam's dog, X17 photogs caught up with our favorite rehabber.

Our guy innocently asked Lindz if she had fun with her friend Lily the night before, and she shot him the look of death before proclaiming "I don't do drugs."

Drugs? He was just referring to the new ink she got with Allen. Who said anything about drugs?

Well, apparently "people do."

Check it out the vid below: