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.
The awkward moment was spotted by Byline Times' Adam Bienkov, who simply tweeted: "Raging."
In November, Mr Raab was accused of mouthing "w****r" under his breath at Mr Starmer during PMQs.
And he sparked fury by apparently winking at Angela Rayner over the dispatch box during another fiery Parliamentary set-to.
He later denied he was winking at Ms Rayner, but was targeting his half-blink at shadow Scotland secretary Ian Murray.
Mr Sunak continued to face questions yesterday about the future of Deputy Prime Minister Dominic Raab, who remained in place after the reshuffle.
Mr Raab, who is also the Justice Secretary, is being investigated by senior lawyer Adam Tolley KC over bullying allegations - with dozens of officials thought to be involved in eight formal complaints.
Mr Raab has denied the allegations.
"The independent adviser is conducting his investigation; I can't prejudge the outcome of that investigation. It's right that it concludes," the Prime Minister said.
"But as people have seen from how I've acted in the past, when I'm presented with conclusive independent findings that someone in my Government has not acted with the integrity or standards that I would expect of them, I won't hesitate to take swift and decisive action.
"That's what I've done in the past. But with regard to this situation, it's right that we let the independent process continue," Mr Sunak said.
