Muscle tissue

Muscle tissue is a contractile body tissue as well as the force behind all bodily movement. It's specialized to contract or shorten forcefully and is classified under three types: skeletal, cardiac, and smooth. The classification is according to the anatomic location and function of the muscle.

When classified by appearance, muscle can be striated (with thin parallel streaks) or nonstriated (without thin parallel streaks). When classified by function, it is voluntary (consciously controlled) or involuntary (not normally consciously controlled).

Let's go over the three types again, but further in depth:
Voluntary striated (skeletal)
Involuntary striated (cardiac)
Involuntary nonstriated (smooth)

Person 1: *existing*
Person 2: "Did you know that muscle tissue makes up a large portion of your body weight?"
Person 1: "Literally NOONE asked"

Skeletal Muscle

Skeletal muscle is one of the three types of muscle in the body. The tissue attaches itself to bone and represents a large portion of body weight on a human body.

The contraction of these muscles is responsible for movement in the body.

Person 1: *moves their arm*
Person 2: "Damn bro that's some fine usage of your skeletal muscles"

Horny Adductor Muscles

The usual adductor muscles but used in a sexy way because "whatthefruits" had a brain freeze trying to remember a word.

whatthefruits: " i feel defeated by a single sexual word"
I think it's the Horny Adductor Muscles

Subtle Muscle

Another term for a small, limp, useless john

My ex boyfriend had a really 'subtle muscle' which is why I left him

or

Older men can sometimes suffer with 'subtle muscle'

Lazy Muscle

A muscle that hangs similar to fat. Some people claim that they actually are fat.

Jim looks like he gained a lot of weight, but he said that it was actually lazy muscle.

friend muscle

To act like a tough guy when your friends are with you, to someone who you would not if you were alone.

Carlos and Jared: Did you talk any more shit to Bill when we were gone?
Xander: No, you guys werent here.
Carlos/Jared: But you're so tough, you have meaningless tattoos, you listen to rap music really loud, and you go by Xander instead of Alex or Alexander.
Xander: I guess we all just have friend muscle.

Muscle Mass

Oh really? You changed up your workout? That's hilarious! See? I'm not completely full of shit.

Hym "Oh! You made it sound like I was wrong before about the muscle mass thing! Guess not. CORRECT AGAIN! MASTER OR CORRECTITUDE!"