Second Boy

An adult male having an affair with a married woman. He is often married himself. He chooses a married woman because she has as much at stake as he does if caught/found out. This makes the woman he’s involved which makes her “trustworthy” in his estimation. He is avoidant of responsibility and emotionally too immature to end or work to enhance his marriage. He doesn’t want to leave the marriage because it provides social currency that implies honor, respect, and integrity of a “Family Man,” but he’s really too childlike, foolish, cowardly, and entitled to be a man and behave with the dig out of the title” man.”. Thus the second descriptor- “Boy”

She’s hooking up for another bootie call with her Second Boy.

Her second boy is kind of hot but clueless.

Keep your second boy under wraps.

Second Boy by Inconvenient August 7, 2026

Second Floor boy 

1) Meathead Jock
2) The superior male of a residence
3) A person whom loves to ingest large amounts of protein throughout the day.
4) A person who has better things to do than play magic cards

"Oh man that second floor boy is jacked."

friend - "Obviously, he is a meathead jock."

Second Floor boy by Mr. Protein Party November 22, 2010

Wifes Second Boyfriend 

Just another name for r/WallStreetBets

I lost money taking my investment advice from my Wifes Second Boyfriend.

Really, by time the Wifes Second Boyfriend yells about a stock, you're usually too late to do anything about it.

Wifes Second Boyfriend by Krashlia March 9, 2021

Second Boyfriend 

Someone who is already in a relationship that you deeply care for and have a loving attachment to. The feelings are mutual between you two, so you make it unofficially official. You don’t want to share this person with anyone other than their significant other

“Monday’s are for second boyfriends”

Second Boyfriend by SecondgirlfriendNicki June 30, 2019

Second Boyfriend 

Someone who is already in a relationship, like yourself, that you deeply care for and have a loving attachment to. The feelings are mutual between you two, so you make it unofficially official. You don’t want to share this person with anyone other than their significant other. You’re in a relationship with each other on the side.

When you have more than one boyfriend

“Monday’s are for second boyfriends”

Second Boyfriend by SecondgirlfriendNicki June 30, 2019