Colloquial refers to ways things are said in a local area, that might be different to other parts. It is a local slang. An example of colloquial diction in a literary piece can be seen in Mark...
Colloquial words are casual words or phrases; found in speech, but not acceptable in formal writing. There ain't nothin' wrong with me (isn't anything) Hey are you gonna move or what? (going to) How...
colloquial terms are unformal and not academic so basically they are slang. Some examples of words used by our generation are like "wanna" or "gonna." An example of phrase is "it's raining cats and...