A crass comment is very stupid and shows that the speaker doesn't care about other people's feelings. In today's day and age, you don't have to wear black to a funeral, but to show up in clown pants is simply crass.

The source of this adjective is Latin crassus "thick, dense, fat." A similar development of meaning can be seen in English dense in the sense of "stupid, slow to understand," from Latin densus "thick, dense," and in English thick, which can also be used to mean "stupid."

Definitions of crass

adj (of persons) so unrefined as to be lacking in discrimination and sensibility

(used of persons and their behavior) not refined; uncouth

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