in my humble opinion - rarely actually humble
with all due respect - usually prefaces an insult
as it were
if you will

"the edge" seems to be the with-it metaphor now. Every pop band was on the cutting edge last year. Now they are all edgy.

BazT, I think "pushing the envelope" comes from math and engineering. I remember graphs with a curving line, below which a material would be stable, and beyond which it might fail. The safe "area" (i.e., safe combinations of parameters) was said to be inside the envelope. Thus, pushing the envelope would mean going into risky territory.

Also, regular Americans have stopped saying "I could care less." That was a fad, and its day is over.