I'm glad 'simples' was mentioned earlier, it just makes the speaker sound really stupid. Also agree with the over-use of 'like' to which I'd add the near-ubiquitous "I was like, yeah.... She was like, no...". I'm loathe to blame Americans for this stuff, which we seem prone to do; someone earlier said Americans seem unable to not use a certain phrase - what, heard all 250 million of them use it, have you? - in fact, people here choose to mimic what they see and hear in US films and TV shows. Thus I now hear many people ordering food saying "Can I get the..." and replying to 'how are you' with "I'm good", and saying "Eewww" instead of the good old traditional "Euurrggghh!"
But anyway, my other dislikes are "Oh come on, it's just a bit of fun", usually to justify some at best stupid or at worst offensive thing; "Just saying", stuck moronically at the end of statements as though protecting the speaker from any kind of come-back; and "I love him/her to bits". Oh and not forgetting, "It's political correctness gone mad!" which it almost invariably isn't (of course prompting the joke, shouldn't that be "Political correctness gone mental health issues"?).
Then there are those come-backs people think are the all-encompassing end to a disagreement: "Get a life", "Get over yourself", "That's just YOUR opinion". Of course it's my opinion, it's me speaking!