Freudian slip (a.k.a. too much Thanksgiving dinner)
Thanksgiving on the shore of Lake Huron. Dinner is finished. I'm trying to recall the name of a math teacher I had in high school. The teacher (who was excellent) was somewhat overweight in those days, so I described him as "rotund." My brother starts laughing loudly. When I ask him what is so funny, he tells me, "you pointed at yourself when you said rotund!"