[scoofy]

It's "snuck" rather than "sneaked." Considered incorrect by many for nearly 50 or so years.

[StavrosK]

Seriously? "Snuck" is incorrect? That's the first time I hear about this.

[scoofy]

It's not though, that's the entire point. All usages except irregardless, which is well on its way, are considered correct, though not so in the past.

Also, snuck is the last accepted irregular verb, rather than pronoun.