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Related to raccoon: raccoon dog
1. Discoloration in the area surrounding the eye(s) due to an accumulation of blood, as caused by periorbital ecchymosis (i.e., "black eye(s)"). Likened to the black patches around the eyes of a raccoon. He had a pretty bad raccoon eye after the bully punched him in the face. I had raccoon eyes for several days after my car accident.
2. A discoloration immediately around—and especially under—the eye(s) due to the smearing or heavy application of dark-colored makeup. Likened to the black patches around the eyes of a raccoon. She wouldn't have such a problem with raccoon eyes if she didn't wear so much makeup to begin with! Whenever I cry, it causes my makeup to run and give me raccoon eyes.
3. A discoloration immediately around—and especially under—the eye(s) due to prolonged fatigue or lack of sleep. Likened to the black patches around the eyes of a raccoon. I must not sleep very soundly because I always have these raccoon eyes when I wake up.
See also: raccoon
a coon's age
An exceptionally long period of time. Based on the folk belief that raccoons (shortened colloquially to "coons") had a longer-than-average lifespan. Primarily heard in US, South Africa. It will take a coon's age to get all this work finished! I haven't been on a vacation in a coon's age.
See also: age