A small wood-boring beetle that tunnels under the bark of trees, which die if heavily infested.

Also a term for a female that "bores under the skin" of every male she comes into contact with. Causing the male significant psychological issues to the point of mental break down.
You are dating Katie? She's a bark beetle bro, you'll be admitted to a psych ward!
by AquaManOriginal August 14, 2017
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