informal(of anaction,plan, etc.) to gowrongin a way thatharmsordamagesthepersonwho did theaction, made theplan, etc.:
Theriskwith making such apromiseis it couldblowup inyourfacelater.
Ifpeoplefindout about this thewholething couldblowup inourfaces.
This is acompletereversalof thestrategythatblewup in the company'sface.