'snuck'? As in something like, 'he snuck out behind my back'?
Or did I imagine it? It made me clutch my pearls in horror, much more than the pitchfork-toting rabble did.
The online OED says it's US non-standard.
The Free Dictionary says: First recorded in writing near the end of the 19th century in the U.S., snuck has become in recent decades a standard variant past tense and past participle.