give (someone) the brush-off
To reject, snub, ignore, or rebuff someone. I thought Rebecca was a good friend until she gave me the brush-off at a party last weekend. Teachers have accused local politicians of giving them the brush-off regarding proposed cuts to pensions and school funding.
give someone the brushoff
tv. to repel someone; to ignore someone. (see also brushoff.) The manager gave her the brushoff when she asked for a raise.