chalk full or chock full chuck full Originally a person or thing stuffed to the point of choking was “choke-full.” In modern speech this expression has become “chock-full,” or in less formal American English, “chuck-full.” Chalk has nothing to do with it. Facebook Twitter Google + Do you make these 10 mistakes? root vs rout vs route ceasar vs caesar epitomy vs epitome disgression vs discretion swam vs swum all for not vs all for naught rod iron, rot iron vs wrought iron practicle vs practical forsee vs foresee absorbtion vs absorption