A person who fails to catch an object thrown too them. Particularly if the object was not difficult to catch.
Someone who does not attempt to catch an object thrown to them is still a catch wang, unless they did not see the object being thrown.
Note: someone who catches an object but then drops it is not a catch wang.

To catch peoples attention

A catch phrase but only one word.

A Guyanese term used by elders. Usually meant to say to a child to go to bed. Or in other cases to go away

Catch you later
See you later

Catch ya on the wave has the same meaning as Catch ya on the flip side

It basically means you will be seeing the person you are addressing(typically a friend) later on.

Catch Yerr means when you say goodbye in like an aboriginal style way