Theresa May and European Commission President Jean Claude-Juncker were filmed having a heated exchange in Brussels on Friday morning, leading to a torrent of online speculation as to what the pair were discussing.

Mr Juncker placed his arm on Mrs May’s elbow in an apparent bid to placate the Prime Minister as she took him to task at the start of the European Council Summit on Brexit.

“This doesn’t exactly look like an exchange of pleasantries between Theresa May and Jean-Claude Juncker as the Brexit summit gets underway,” wrote journalist Philip Sime, sharing the video on Twitter.

Twitter users quickly went to work guessing what the pair were discussing.

Others were quick to compliment the cinematic camerawork of whoever filmed the conversation.

Lipreading experts eventually deduced that Mrs May was confronting Mr Juncker over comments he made on Thursday evening in which he called the UK’s position “nebulous and imprecise”.

The Oxford Dictionary website defines “nebulous” as “in the form of a cloud or haze; hazy” or “(of a concept) vague or ill-defined”.

This clarification did not stop the jokes.

In fact, interest in the word “nebulous” rocketed on Friday afternoon, according to the Google Trends team.

But as one Twitter user pointed out, if Mrs May believes being called “nebulous” is a horrifying insult then she better not look at her mentions on Twitter.