the post-eating phenomenon where one's mouth hurts and might bleed due to scraping of the sharp Captain Crunch cereal against the gums and roof of the mouth during mastication. The Cereal even after soaking in milk can stay sharp and lacerate gums if eaten hurriedly.
You need to watch out for Captain-Crunch mouth if you are engaging in oral sex and are at risk for STD infection.
by GDDPHD February 21, 2015