Sometimes called "Yoner", is when one gets an erection from excessive yawning. They
will often come about with no warning and are usually harder than a
normal erection. They
will usually happen in the morning, often during class or at work.
Guy 1:
Woah dude are you getting off to our math lesson?
Guy
2: No dude I've got a massive
yawn boner right
Guy 1: Oh damn I hate yoners