A one-hander is when you only use one hand to open a soda can. This is accomplished by holding tight with the thumb and middle finger and pushing the tab up with the index finger.
1) - Man, have you learnt the one-hander?
- Yeah, learnt it yesterday.
The act of calling your friends to let them know that you want to speak to them. You call, let the phone ring once and hang up. If they feel like talking to you, they'll call you back.
Jeff: Oh, Jane just gave me a one ring. Wonder what she wants?
Calls her straight away.
Jane: Hi Jeff. Just wanted to say hi and see whats new in your life? blah....blah...blah
To take (another person's property) without permission or legal right and without intending to return it. So basically you are taking the one item or items and it's done, son!