Women addressing one another (informally) as "Mrs", as in "how you doing Mrs?" – I'm not entirely sure why, but it makes my flesh crawl.
"a big ask" – annoying and meaningless, given the availability of the far more pleasant "a tall order". The latter conjures such amusing imagery for me, the former is lumpen and meaningless.
"big style" in place of "very much so" or "very well indeed".
I have countless others, but would prefer to avoid infuriating myself by listing them.
Many are borne of the TV sports pundit – usually not the commentator, who describes what is happening for the benefit of the blind, but more commonly the co-commentator or pundit, whose job I can't fully comprehend. Surely stating the patently obvious after the event would be a job done far more entertainingly done by someone witty and erudite, rather than someone with frankly unnecessary first-hand experience. What is television supposed to be, after all, if not entertainment? Replace Chris Kamara with David Mitchell for instance, it'd improve matters, er, big style. Now back to the studio.