Snuck is not a word I tend to use, but I came across it yesterday when I was looking up something else. According to an article by Maeve Maddox, Daily Writing Tips.com, “the word snuck, as the simple past of sneak, is regarded with disdain by many speakers and writers”. Sneaked is the correct past tense and past participle, and snuck is less formal; however snuck is accepted American usage and many extracts have been found in the New York Times and the Chicago Tribune (for extracts see Daily Writing Tips article).
Around the globe
The Bee Dictionary.com mirrors the above, saying that sneaked is more traditional, but “in American English ‘snuck‘ has become increasingly common as the past tense of ‘sneak‘”. According to unscientific research mentioned in an article on grammarist.com, snuck (as opposed to sneaked) has been cited in news publications more in Canada than America; however in New Zealand and Australia both words are used equally. They say that only “British Writers shun snuck” and tend to use sneaked more frequently.
My thoughts: sneaked sounds better to me so I’ll go with that spelling for now (but that’s probably because, being British, I’ve heard it more). I do have many Canadian relatives though, so will be looking out for it in any written communication I receive from them.
So, the question is, do you write snuck or sneaked?