My baby brother's name is a long story, short verison is he had long hair and when he would sweat he looked like a "Mutt" (the dog type) cause he did this thing where he would chew on his tounge on one side of his mouth breath heavy and sweating, his size didn't help much either he was a runt next to me and the middle brother, his was "Corky" (I have no clue our mother gave it to him) so the name just stuck and he is Mutt to this day.
It's funny cause even his daughter calls him that sometimes.
I named her "Junior"
when her mom was carring her she said it's going to be a girl and I would always say nope it's going to be a boy isn't that right Junior well mom got kicked everytime I said it so I am the only one allowed to call her that and she will tell you that as well.
I am "Chachi" (the Mexican version, google it) A friend gave it to me one day we were at the lake with a bunch of friends and were talking and he called me that, all the friends laughed and started to call me it and years later I still go by it even the wife calls me that.