Usually occurs from a man or boy between the months of
May all the way to September. A
testosterone boner is when a man notices a very attractive girl wearing minimal clothing and all the "alerts" of a boner go off
minus the inconvenient and obvious side effect.
"
Dude, G Thom, did you
see that fine girl in the short shorts?"
"Hell yeah I did, damn girl gave me a testosterone boner."
"but you're not showing?"
"exactly, doesn't mean I'm not
poppin' on the inside."