It's not really an idiom. You can figure out the meaning if you think about it. You're stretching your muscles.
If someone says "I need to stretch my legs," however, they mean they need to walk around a little bit to think or to wake up.
This is not an idiom. It actually means to stretch your arms and legs. To take a break.
An "extremity" refers to your limbs (arms and legs). Lower extremities are your legs; upper extremities are your arms.
Crossing your arms or legs means putting one in front of the other. When you cross your legs, you're usually sitting down, and you either lift one leg and put it atop (over) the other one, or you just put the ankle or calf of one leg on top of the other thigh. You only do this if you're wearing pants, by the way! Crossing your arms can mean any way that you put one arm in front of the other, but people usually mean the position where your arms are pulled horizontally in front of your chest with your hands tucked against your forearms.
its is a person without arms or legs
The sides of a geometrical figure, particularly a triangle, can be called either arms or legs. Arms is more commonly used.
This isn't an idiom because you can figure it out if you look up the word "pins." It is a SLANG term meaning legs, so you knocked him over.
This idiom gives the image of someone with their arms spread out to either side. You say this when you're about to hug someone. You might also use it to mean any inviting stance.
It's not an idiom - it's a description of what happens when you get nervous and excited. Your legs feel wobbly and you might even fall over because your knees get weak and collapse underneath you.
a Donoghue is a God-Like species with 19 legs and arms.
head, arms, trunk, and legs- is that what you mean?
Yes, if by paraplegic you mean loss of legs, still have use of arms.
It means that your arms or legs or parts of them have been removed either by a doctor or by a accident.