A person who masturbates so frequently that one of their arms is more muscular than the other. (Can be either genders)
"Ever since Corey hit puberty one of his arms is super muscular, I think he's becoming an arm man."
The unbendable arm is when you put your right arm on someone else's shoulder and without flexing, have someone push down on your arm. If done correctly, your arm won't bend...
If you happen to be brave and have a tough arm, then you can have someone hang from it, and do pull-ups if they're up for it
Yo Julie, come hang on Brandon's Unbendable Arm!
The Unbendable Arm is trippy yo!
Let's try The Unbendable Arm Tonight at my party!
When an arm is under the blanket, when it would quite obviously be more comfortable above it, implying inappropriate touching of ones own body, or masturbation
Garfield, that's quite a "suspicious arm" you've got there, are you excessively masturbating to iCarly porn again?
When your arm is under the blanket, when it would quite obviously be more comfortable on top, implying touching of ones self inappropriately, or masturbation.
That's one "Suspicious Arm" you've got there Garfield, are you excessively masturbating to iCarly again?
When one arm out of two is proportionately muscular to other.
Figuratively, addressed to the freaks at work performing futile functions such as carrying orders to inferiors; shredding paper, drawing salaries et cetera.
Rafa's senior arm rams a punch on a backhand shot.
Where Lee has a cheeky beer
“Did you see how hungover Lee got in The Coopers arms last night?”