brush off
US /brʌʃ ɔf/
UK /brʌʃ ɔf/

1.
ignorer, balayer
to ignore or dismiss someone or something in a dismissive way
:
•
She tried to talk to him, but he just brushed her off.
Elle a essayé de lui parler, mais il l'a simplement ignorée.
•
Don't brush off his concerns; they might be important.
Ne balayez pas ses préoccupations ; elles pourraient être importantes.