To be
pleased by something.
Traditionally the word for erection, "
boners" has taken down the same path as
the tits, developing a figurative meaning despite its more obvious origins.
"
Boners" does not always connotate sexual interest.
"Wow guys I am all up in boners about this new movie coming out."
"Tom is boners about his new car."
"
Danny popped like five boners over the idea of spending the winter in
Hawaii."