I was trying to think of the word last night, and it came to me as soon as I reread this post this morning: GERUND! isn't wingin' a gerund? and I think technically this could be considered a complete sentence, cuz you know how like in "command" sentences, the subject is not stated, it's implied - e.g., "(hankster, you) stuff it!" Ergo, "(i be) wingin'it" - is a complete thought, and therefore a sentence, and not a mere fragment. Altho fragment is a delightful word. FRAAAAGGGMINT!