whole cloth

Short definition from Wiktionary

Noun

1. 1
   A newly made textile which has not yet been cut.
2. 2
   The fictitious material from which complete fabrications, lies with no basis in truth, are made.
3. 3
   Something made completely new, with no history, and not based on anything else.

Adverb

1. 1
   in full extent, wholesale, entirely, without changes or additions