acid cheeks

Acid cheeks is when a user of a lysergamide (such as LSD) is smiling so intensely that their cheeks begin to hurt.

After taking acid, when I felt the acid cheeks, I knew it was kicking in.

by MisterSnazzy July 30, 2016

My cheeks are full of lactic acid

The act of laughing so hard that your cheek muscles' anaerobic respiration goes into overdrive and overflows with lactic acid as a result.

hahaha, alan you're so funny my cheeks are full of lactic acid.

by a little laughter April 6, 2021