After deputy prime minister Dominic Raab's use of the term to describe Boris Johnson (currently UK Prime Minister) and thereby exculpate him from any blame for an appalling speech he made to the UK's Confederation of British Industry, the term was defined in The Guardian by Ishowerdaily in this way:
"Tiggerish"
Expecting an entry in the Urban Dictionary now with the definition being "disrespectful and wankerish display of, what may or may not be contrived, ignorance."
QED
The name had previously been applied to disgraced former Health Secretary Matt Hancock.
He said the prime minister was “focused on the job at hand”, and was an “ebullient, bouncy, optimistic, Tiggerish character and he livens up his speeches in a way that few politicians past and present have done, but actually there is a steeliness to him as a prime minister and indeed his team, and we work as a team.”
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.