My top list:
1.  wreak havoc - nobody has any idea what this term originally described in terms of total destruction
2.  awesome - ditto (may the ancient Greek gods smite those misusing this one)
3.  grow - used as a transitive verb - any time I see an offer to "grow my income" I automatically shred and ignore.
4.  any noun now used as a verb - for no good reason except laziness