Hi Evedawn,
You can do any one of three options:
1. Tell him face to face that you dont like to be talked to in that manner, and for him not to do it again.
2. Mention it to your boss when she comes back, so she's aware of it, or when you have your one - to - one.
3. Dont act on anything just yet, and see whether he does it again. If he does, then tell your manager.
Best of luck :0) x
P.S If you're on a lunch break and about to eat something, DONT go onto Mrs_Overall's spots and zits thread.........you wont be eating anything then .......LOL