Morgan ran to the left touchline after nodding the ball beyond the despairing grasp of Carly Telford to put the USA back in front on 31 minutes.
As the Orlando Pride striker marked her goal, she raised her right hand to her lips, mimicking how British people stereotypically consume the nation’s favourite drink; tea.
Morgan stretched out her right little finger to over-exaggerate the pose as she pretended to drink from a cup.
And fans will no doubt have been fuming at home as the USA star trolled England and their near neighbours having just given her country a 2-1 lead.
Morgan’s sixth goal of the tournament was her first since she bagged five in the 13-0 group-stage demolition of Thailand.
And it came following a superbly whipped cross from Lindsey Horan, which the unmarked 30-year-old cantered on to.
Morgan’s header restored the USA’s advantage which had first been established through Christen Press.
And they were counting their lucky stars it remained intact after two VAR interventions.
England thought they had drawn level at 2-2 midway through the second half when Ellen White looked to have bagged her second goal of the night.
However, the new Manchester City signing was correctly judged to have drifted into an offside position before she struck.
White’s goal being chalked off was followed by another moment of controversy when she went down in the box after being caught by Becky Sauerbrunn.
Referee Edina Alves Batista pointed to the spot after a second VAR review within 10 minutes showed there was contact between the England forward and the USA defender.
England captain Steph Houghton stepped up to take the resulting penalty which offered the Lionesses the chance to take the semi-final to extra-time.
Her weak spot-kick, though, was no test for Alyssa Naeher, who was immediately mobbed by her USA team-mates having collected the ball.
Houghton’s miss proved costly as the USA held on for the win which booked their place in a third Women’s World Cup final on the bounce.