The inevitable Upper Lip Sweat that occurs while consuming extremely spicy foods.
Jean's chili was so tasty, but even though I took off my shirt, I got major ULS.
by Ston Jrand December 09, 2010
Uncontrollable Laughter Syndrome. A condition whereby one suffers chronic laughing fits which cannot be easily stopped once begun.
He suffers from ULS.
by joy_lukos November 12, 2007