>>917
The place used ..unpalatable.. doesn't stay in especially twoch though it
is "パクリ" (pakuri).
You may think parody = Pakuri.
However, please note that malice is often especially contained when
saying, "Pakuri".
"Pgr" becomes it , saying that "プゲラ" (pugera) if it pronounces.
It is a word that matches two imitation sound "プッ,Ptsu" when jeering and "
ゲラゲラ,Galley galley", and abbreviates it.

As its source
http://www.media-k.co.jp/jiten/wiki.cgi?mycmd=search&mymsg=%8E%CC%8E%DF%8E%B9%8E%DE%8E%D7