The comedian said that he was unconvinced by Adele's claim to be "prouder" of her Brits victories than the success she has achieved worldwide.
Referencing ITV's controversial decision to cut the star's speech short, Skinner quipped: "I think James Corden did her a favour.
"With all that proud to be British stuff and saying she was waving the flag for us, I was not happy with it. I think she was a bit hypocritical. How can she say she is proud to be British and then give a very American gesture by sticking one finger in the air?"
He joked: "It should have been two fingers as that is how I fly the flag!"
Skinner went on to argue that this year's ceremony had been a letdown.
"The Brits used to be this massively controversial thing with people taking trousers down and someone throwing water over John Prescott," he told That Sunday Night Show. "It has gone really downhill now."
It was reported at the weekend that Adele has scrapped plans for an ITV special in retaliation over the Brits furore.
The 'Someone Like You' singer yesterday (February 26) returned to the top of the UK album chart with 21.
> Joey Barton: 'The Brit Awards were a giant pile of s**te'
Watch Adele's Brits acceptance speech below: