blow-off
noun
• the action of emitting a gas, typically to reduce pressure to a safe level.
• "steam blow-off piping"
blow off
• fail to keep an appointment with someone.
• "I just made this date before I met you—I didn't want to blow her off"
• ignore or dismiss someone or something.
• "I took the car in and told them about the problem and they just blew me off"
• break wind noisily.
