The phrase "complete disregard" means not paying any attention or care to something or someone. It suggests ignoring or neglecting completely. Full definition
It also exists in relationships in which you have moments of complete disregard for your own safety. (tribecatherapy.com)
Conventional sports nutrition focuses on studies focused on the short term performance gains of carbohydrates with complete disregard for how this potentially can disrupt blood sugar and insulin levels. (vespapower.com)
In my view, any sexual activity that spreads deadly diseases is sinful because it shows complete disregard for human health and human life. (religion.blogs.cnn.com)