When your significant other becomes horny at the thought of you, and the thought of them being horny at the thought of you makes you horny in turn.
Girl: Oh babe, your back muscles are sooo defined and it's turning me on.
Guy: -moan- (now erect, as counter-boner)
Guy: -moan- (now erect, as counter-boner)
by LufffiStudios August 31, 2013

When a male gets an erection from out of nothing. It just randomly gets hard. There is no hot girl or anything else that can cause a boner.
by rudyj2112 August 17, 2010

by The Fuzzy Nut January 17, 2013

When you black out and wake up in a bush the next day with morning wood. In the ideal situation, your penis should be the only thing sticking out of the bush.
"Damn bro we were so fucked up last night, I woke up with a Bush Boner. Good thing the landscapers didn't chop my dick off!"
by bigballerboi November 20, 2019

when your tampon or pad is soaked and you don't have any extras so you stuff your underwear with tissues and it looks like a boner
by Nothingsushere April 19, 2016

When you're absolutely wasted and can't get your dick up, but you need to fuck a chick. You pray to Jesus for a solid erection and he comes through like a bro.
Q: Hey, what are you doing in church?
A: I was smashed the other night but needed to fuck this chick, so I prayed and God tossed me the greatest Jesus Boner I've ever had. Now I feel obligated to go to church.
A: I was smashed the other night but needed to fuck this chick, so I prayed and God tossed me the greatest Jesus Boner I've ever had. Now I feel obligated to go to church.
by Thefuckersattheendofthetable November 15, 2016

by Super destroyer fuck machine August 17, 2011
