Dominic Raab spotted giving Keir Starmer the evils during President Zelensky's visit to Parliament.
The Labour leader was filmed chatting to Rishi Sunak as both waited for the Ukrainian leader to deliver his speech.
But as other MPs made small talk around them, the under-fire Deputy Prime Minister fixed Mr Starmer with a hard, unblinking stare, shooting daggers at him for a solid seven seconds.