Wiktionary
brush off
n. (alternative spelling of brush-off English) vb. 1 (&lit brush off English) To remove something with a brush. 2 (context idiomatic English) To disregard (something), to dismiss or ignore (someone), as unimportant. 3 To depart with a sweeping motion.
WordNet
brush off
v. bar from attention or consideration; "She dismissed his advances" [syn: dismiss, disregard, brush aside, discount, push aside, ignore]