A self centered jerk, is very ugly and not a very good person or friend to you. He doesn't think much of others.
by Lynsey Lover July 28, 2012
Get the Jackmug. The most amazing guy on the planet. Jack makes you feel warm inside. He is short but athletic. He’s attractive when he’s not trying. He will take the time to slow down the conversation and start “small talk” he hits the ball out of the park when it comes to getting girls. They are all over him. He may not be the smartest but he is The cutest!!! He’s my boyfriend!
by NoNoHoney December 20, 2017
Get the Jackmug. by JackRosa February 25, 2020
Get the Jackmug. A beautiful man, inside and out who makes you feel like the most special person in the world. He is very intelligent and thinks about others. He puts the ones he loves before himself and is always up for a good conversation. If you meet a Jack, you will most definitely fall for him!
by Guitar playing goat June 13, 2016
Get the Jackmug. Dave was really Jacking on today. Not only did he complete all of his work ahead of scheduled, he also helped his coworkers finish their work and he cleaned up the lunchroom.
by MFS27 July 2, 2020
Get the Jacking onmug. 
A strong minded man or boy, often gymnast and a show off, dates a lot of girls, steels and brown hair. Works hard and shows off his gynastic skills
Girl: "why would i date u, u have nearly gone out with the hole school"
Boy: " i know eight im such a jack
Boy: " i know eight im such a jack
by ~Da- banta~ June 11, 2015
Get the Jackmug.