Jack is a name that annoyingpeople usually have. Or cool people. "Jack shut up" is what you say when your friend named Jack is getting a little annoying and corny.
This is often a truthful statement whether talking about a canine or sapiens specimen. Jack makes a great name for man's best friend, and likewise most men named jack develop deep and irreparable trauma regarding their name being for a dog.
Male Sapien Jacks typically can be found surfing on various furry subreddits, buying leashes and collars for their owners to use on them, and in their crate when their owners decide its time for bed