tren

Short for Trenbolone, a popular anabolic steroid hormone.

It is arguably the most powerful and best, and is considered by many to be the "God of all Steroids."
Things you should know:

- The side effects of tren are extreme, as should be used cautiously by newbies.

- Trenbolone was never made for human consumption, it was created for cattle to induce greater muscle growth prior to slaughter.

- It burns fat at an extremely rapid pace while significantly hardening the muscle, giving you an supreme look with supreme strength, as well as building significant muscle mass.

- There are 3 types, Tren Acetate, Tren Enthanate, and Tren Base. The results are the same but the esters are different, the ester determines how long it takes for the hormone to work, how long it stays in your system.
Lifter 1: Bro how can I get to a 200 kg bench press without weighing over 100 kg?
Lifter 2: You'll have to tren hard... tren Tren TREN!!!
by Zyzy March 28, 2016
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natty

A gym goer who trains hard with heavy weights and follows intelligent programming and with good diet however isn't that big, muscular, strong, or ripped (compared to fitness models). Short for "Natural", as in, does not use any steroid hormones at all.

"Fake Natty": A steroid user who says he's a natty
"Half Natty": A steroid user who takes extremely small doses, is usually also a fake natty
Guy who doesn't lift but watches a bunch of youtube videos about Kali Muscle and Jeff Seid: "Wtf bro you've been lifting for 4 years and you only bench 245? Bitch-azz"
Natty: "Ugh fking aye, I'm natty, try to get there yourself phaget."
by Zyzy October 21, 2015
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