The Bucky car salad

The act of breathing through your mouth and not your nose when something smells really bad , to keep from vomiting.

"As Holly was cruising down the Seward Highway, getting stuck in several road construction stops. She noticed a strong odor coming from the back seat. She had to pull the Bucky car salad maneuver to keep from throwing up from all the dog crap stomped and smooshed all over the back seat by breathing through her mouth and not her nose.