Micro Gym, the most smallest amount of gym work.
A tiny work out full of huffs, puffs and yawns.

Usually a young man from the Northern East Coast area. Always has a "wing man" (also a Gym Douche). They usually wear Air Jordan shoes & basketball shorts, and baggy shirts with the entire sides cut out. Also sporting their fresh Blow Out haircut. They make copious amounts of noise and hit on the local gym girls. They also believe that they own portions of the gym and have certain rights that "Regular Members" don't have.

That one person or persons who walk around the gym like they are the incredible hulk,They look at all the ladies and think every woman wants them,They constantly are looking at themselves in the mirror,If they see a guy lifting 20kg weight bar they come along and lift a 120kg weight bar slam it on the floor and walk off like the incredible hulk,They talk real loud and want to be noticed,They usually suffer from roid rage and jealousy and just come across as real arrogant jerks in general

someone who benches 300 pounds with the worst technique then leaves the weights on the friggin bar when they leave.

1. A gym penguin is a subspecies of gym rat. The gym penguin does lots of dead lifts, bench presses and leg presses at the gym, but does nothing else because he thinks cardio and flexibility training are "faggotry." As a result of his training imbalances, his neck disappears and he cannot extend his legs normally or walk fully lower his arms. Instead he must waddle along bowlegged with his arms sticking out, but only for short distances as he is quickly winded.
Gym penguins also tend to evolve loose guts from over-reliance on weight lifting belts, so beware their incontinence.
They tend to huddle with others of their kind and communicate via a strange gasping quacks as most are mouth breathers.

2. The term gym penguin can also be appropriately applied to any 20 year old who cannot touch his toes
3. Female gym penguins while exceedingly rare can be easily identified by their shortened necks

middle-aged man who was a star athlete at your school approximately 15 or 20 years ago and never got over their glory days

an over-aged woman who thinks she controls the world.