I appreciate I have not lived in the UK for many years but we still travel there regulary and speak with British family and friends. I have not heard any of these phrases.
While The Telegraph has deemed 'picky bits' "the most revolting phrase in the English language", more Britons have a positive view of the term (43%) than a negative one (25%), with 31% neutral
Net positivity towards...
Picky bits: +18
Maccy Ds: +15
Holibobs: −23
Tommy K: −44
The rona: −44
Jackie P: −53
Menty B: −57
Cozzy livs: −65
Platty joobs: −65
Statey funes: −78