I actually like, and use the correct expression:
"I could not care less"...
Some of my less than faves:
-"You know what I mean (I'm saying)"
-Relaying a conversation: "So, he saysto me..." (weird use of wrong tense)
-"photo journalist" title for the talking head "news reporter" giving some jive story from "the street".
biz expressions beat to death:
-"he/she gave it a 110 %"
-"I'm efforting that right now."
-"going forward"
-"accretive value" when justifying why a company just bought another losing company.
-the majority of biz buzz bs expressions used by the people on the CNBCs of the media; the CEOs won't say crap with a mouthful, the "analysts" have a motive and, the "talent" could barely read a Balance sheet, imo.
Just off the top of my mind...I'll think of more. 
Pretty good thread, imo.
BR,md