Staring fixedly; slang for glaring or eyeballing someone—looking at someone intently.
電車で向かいに座っていた人にガン見された。
Someone sitting across from me on the train was staring me down.
プレゼン中に緊張して聴衆をガン見してしまった。
I got nervous during the presentation and found myself staring intently at the audience.
子どもがお菓子をガン見していて、買ってほしそうだった。
The child was staring at the sweets as if wanting me to buy some.