An erection of the penis (or a moistening of the vagina) due to performing in front of a large audience without becoming sexually aroused.
Dylan: I'm so nervous to play Hamlet in front of 400+ people tonight! I have stage fright!
Erik: I never get stage fright. One thing I do get is stage erection. It's not like I'm horny, but I always pop a boner whenever we get into that swordfight at the end. Is that weird?
Dylan: ...yeah, man.boner stage fright props blue balls dirty sanchez