Why Sneaked Instead of Snuck?

Sneaked is the past tense of sneak when the verb is treated like a regular verb. Snuck is the past tense of sneak when the verb is treated like an irregular verb. Some people frown upon snuck, so if you're in doubt about which form to use, sneaked is always the safer option.

Are sneaked and snuck interchangeable?

Today, the primary difference between the words comes down to conjugation. “Sneaked” is the regular verb conjugation of the verb “sneak,” and “snuck” is the irregular verb conjugation. Both versions of the verb are appropriate to use in the past tense or past perfect tense.

Is snuck a slang?

Snuck as the past tense form of the verb 'sneak' is considered to be a real word chiefly used in North American English. ... However, the form snuck has found its way into use despite having no precedent amongst other verbs ending in –eak (creak, squeak, leak, etc.).