Let's define...

The word: COPYCAT  

Wiktionary:

Etymology

From copy + cat (“person”). It has been in use since at least 1896, in Sarah Orne Jewett's The Country of the Pointed Firs.

Noun

copycat (plural copycats)

1. (informal) One who imitates others' work without adding ingenuity.

Adjective

copycat (comparative more copycat, superlative most copycat)

1. Imitative; unoriginal.

Verb

to copycat (third-person singular simple present copycats, present participle copycatting, simple past and past participle copycatted)

1. To act as a copycat; to copy in a shameless or derivative way.

Let me define it from my point of view, trough my observation:

1. Someone who doesn't know him/herself.
2. No identity.
3. Someone who can't stand out.
4. Someone who can't make a stand for him/herself.
5. Irresponsible.  Doesn't want to be blame (if there's anything to be).
6. Coward!