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A potential boner. Not quite a semi, but far more than a softie. Should be considered a compliment when wielded by men who wear lab coats for a living.
"Your knowledge of the Southern blot method is giving me a proto-boner."
by ompelle December 15, 2008
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2
A girl or woman, whether in media or one's personal life, that was the subject of a man's sexual fantasies during his formative years, usually from just before puberty to the end of puberty. Derived from proto, meaning primitive, and boner, meaning erection.
"Oh man Shakira is SUCH a protoboner!
by tuusmater May 12, 2018
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