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3.
An afflication commonly possessed by someone who is excessively cheap, resulting in that person being unable to reach for their wallet (or purse) to pay for something.
Troy had a bad case of dinosaur arms at dinner last night - he didn't even offer to pay!
by Kinsman March 15, 2005
 
1.
1. Adj. Used to describe anyone or anything suffering from almost any kind of retardation.
Refers the forearms of a T-Rex which, although the best dinosaur, suffered from tiny stunted dinosaur arms.
It is thought that T-Rex suffered from the aforesaid cripple-tastic limbs because otherwise, it may have been just TOO awesome.
2. Insult used when someone does something retarded.
1. (Dinosaur Arms Sufferer, let's call him Colin): "Woah hey guyz, I just heard that homosexuals are gay!"
(Cool Dude): "Damn, that Colin is SO Dinosaur Arms"
(Hip Fellow): "Word to your Mother"

2. (Colin): "Zomg, I just dropped my pocket on the floor!"
(Cool Dude): "Dinosaur Arms"
by SirPsychoSubmarine March 20, 2008
 
2.
It is what you call an arm when you are cuddling and there is no room for it. The arm is typically bent at the elbow and placed uncomfortably between two bodies. This can also be likened as a T-Rex arm or awkward arm.
"I've gotta move; I'm totally getting dinosaur arm."
by judecreek October 12, 2007
 
4.
1. Adj. Used to describe anyone or anything suffering from almost any kind of retardation.
Refers the forearms of a T-Rex which, although the best dinosaur, suffered from tiny stunted dinosaur arms.
It is thought that T-Rex suffered from the aforesaid cripple-tastic limbs because otherwise, it may have been just TOO awesome.

2. Insult used when someone does something retarded.
1. (Dinosaur Arms Sufferer, let's call him Colin): "Woah hey guyz, I just heard that homosexuals are gay!"
(Cool Dude): "Damn, that Colin is SO Dinosaur Arms"
(Hip Fellow): "Word to your Mother"

2. (Colin): "Zomg, I just dropped my pocket on the floor!"
(Cool Dude): "Dinosaur Arms"
by SirPsychoSubmarine March 21, 2008
 
5.
A spazzy arm, where your arm is crooked and your wrist is bent so that your hand points downwards and cannot leave your side. Spastics are the most well-known dinosaur armers.
John has a dinosaur arm. Because of it he has earned the nickname Tyrannosaurus John. Watching him try to peel an orange is too funny.