LICKETY-SPLIT Meaning of LICKETY-SPLIT in English ■ adverb N. Amer. informal at full speed.OriginC19 (in the phr. as fast as lickety 'at full speed'): from a fanciful extension of lick + split . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004