Mergles usage began with horny Asian businessmen when they could not remember any english words with which to communicate their ideas to underage prostitutes. Now commonly used for a lack of words.

Used to define a "blah" not caring or frustrated state.
Can also be used to describe a boring or blah place

1) To screw something up in a horrible way.

2) To suck big hairy balls for breakfast for free and like it.