Eww! Has it crossed the pond yet?

It has definitely crossed over to the UK. My 15 year old (a couple of years ago) daughter used it as expression of choice when faced with a gross situation. Sadly I have even used it myself but I like to think in a post-modern ironic sense ;)

Like many Americanisms that cross the pond I imagine it is likely to have transferred through TV programmes, such as Friends.

I’m a 62 year old (U.S. Male); the term ew or eww, as described, is equivalent to yuck in a more tactile sense. You may react to a slimy frog being offered to you, to hold; with the opportunity to say no, with Yuck!, as a response. But if a crass person just says here, hold this, without description, or knowledge of what it is, and you hold out your hand as a trusting person, the term ew or eww is likely to be used, when you actually feel the slimy creature placed in your hand.

This is an excellent question about word usage in context.

This response is strictly my opinion.

At school in England around the turn of the millenium, "eww" was certainly in usage. I think (as mentioned in the comments) the huge popularity of US television shows may have had something to do with the frequent use of word.

Other words that commonly replaced "eww" as expressions of disgust were "sick", "gross" and "vile".

Another of the most frequently uttered words at school was "minging" (along with "minger" and "mings"). The word could be used both on its own as a reaction to experiencing something unpleasant ("minging!"), or as part of a sentence ("that looks/smells/tastes/feels minging"). This may well have been a northern thing as I don't remember friends and relatives in the south being familiar with it (at least at that time).

Edit: I need to add the ever-popular vomit noise "blurgh" to my list.