When you get "excited" about something that is literally fucking hilarious and no one else is around.
Cletus (Extreme Trumpeter): "Man! I'm really glad that Fuhrer Trump selected the extremely intelligent goddess that is Miss Sarah Palin for vice Fuhrer!"
Jack (Sane person): "I have such a comedy boner right now..."
Pressing your erection against the object of your affection.
Before putting it in, I gave my loved one a few boner bends against her knees, just to let her know I care.
When you're in a 1 vs 4 situation and you manage to win the round, and your penis becomes enlarged.
"Holy fuck dude nice clutch!"
"Yeah man! I have such a clutch boner!"
That feeling you get after hitting a bong.
Dude, that hit gave me a bong boner so bad.
When a guy/girl has such low body fat that there's veins all over their body, resulting in their limbs resembling a full on boner
Guy 1: "Bro did you see that guy? He was shredded cunt!"
Guy 2: "Yeah brah, he looked like he had a boner for arms!"
Boner-bod
When you have a random erection for no apparent reason, therefore nothing in the vicinity can claim your boner. Often appears at the most unfortunate and awkward of times.
Oisin: My job interview to become a pre school teacher didn't go so well, and my no claims boner didn't help either!
Jordon: I hope no one at the family reunion saw my no claims boner...
Shane: Thankfully, after ten minutes my grandmother came in to the room and broke my no claims boner
I just got a mind boner; what if socks were self drying and cleaning!