During the height of the Crips and Bloods gang era. Crips would use different sounds and phrases to call out "represent". Some would yell "C-WORLD" to make themselves known.
A 4th world country is a nation that is so severely undeveloped in terms of infrastructure, is so poor, and has such political instability, that it makes a 3rd world country look extremelydeveloped.
There is currently no such thing as a 4th world country; however; the term may still be used as hyperbole for somewhere that is extremely undeveloped.
A beginner game developers'/coder's first steps of coding; by printing out 'Hello World!'
(1) The boy created code that said, "print.text./('Hello World!')/'" and it worked!
(2) The boy's code opened a window that said, "Hello World!"
(3) The first-time game developer created the starters' code that printed Hello World!