Desk side. Also deskside, desk-side. If you want to come to my office, just say so.
Impact. Overused in general, unacceptable when “verbed.”
Irregardless. Non-word combination of “irrespective” and “regardless.”
Literally, in the non-literal sense. “She literally exploded with excitement.”
Optics, unless you are an opthamologist.
X and myself, e.g. “My colleague and myself are delighted to be here.” “I” or “me” is nearly always correct instead.
Which words would you like to banish from business writing?