A "hard stare" refers to a very intense and firm gaze or look that someone gives, typically indicating seriousness, determination, or disapproval. Full definition
It will be hard staring at this beautiful jar of goodness in the fridge without eating it for a couple days, but the longer it sits, the better it tastes! (flavorfuleats.com)
When one is faced with annoying knobs in one's life, one tends to give them a long hard stare with eyebrows.Normally does the trick. (abeachcottage.com)
With the UK getting this one a whole month after the States (a Paddington hard stare in the direction of the World Cup for that one) we'll be waiting until 3 August to see how Scott Lang and Hope van Dyne get involved in the Avengers» plight. (empireonline.com)