Someone who eats a lot of veggies, has a toned bod, very little body fat, and can hike anywhere at any time.

Will surprise almost everyone with their body strength. Usually tanned. Would definitely be the type who goes to cross fit/soul cycle classes.
Have you seen Harry's summer body?
Oh my gosh he's a LEAN MACHINE
Get the Lean Machine mug.
Someone out of a group of stoners who is the most stoned at the time of smoking.
Tom - yo dude , bens really stoned

Mathews - yeah I know he's a lean machine !
by Snow36 November 11, 2013
Get the lean machine mug.
The greatest rapper and bodybuilder of all time. 2pac and biggie died because his lyrics blew em away.

Also known as MC Keegs, he is an uprising rapper from Compton. As a member of no gang, he puts his studies first while balancing rapping and weight lifting. his immense strength and influence in the community is unrivaled.

Usually as a compliment, which bestows enormous value on the beholder. The only person to ever meet this title is MC Keegs, the Lean Mean Keegan Machine.

Currently, he has projected 5 albums, of which we know the name

Album #1: Mothafuckin' Hoes
Album#2 All over My Dick
Album #3 Parental Advisory
Album #4: My bitch is my dawg
Album #5 THE Lean, Mean Keegan Machine
Dude, ya hear Ugly, a single from Mothafuckin' Hoes by the LEAN MEAN KEEGAN MACHINE?. It's amazing. The only song on my ipod.
by Host of 99.9, MC Keegs Live December 7, 2010
Get the Lean Mean Keegan Machine mug.
A person of any of the 500 genders or species, that make dank memes for not only entertainment but as a religion.
Steve: yo that lit, 420, 360 notescope, here comes dat boi.
Me: wow steve, your one heck of a lean green meme machine.
Steve: ( Dead serious) Im more dead inside the xx.
Me: we dont speak of x, rip x in the chat.(cries)
(sene fades to Black)
by TheOnly1of1 October 29, 2018
Get the Lean green meme machine mug.