The term 'stuffed to the gills' is an idiom that means to be overly full or OVERFED. It can be used to describe a person who has eaten too much, or a situation where there is too much of something. The crossword solutions for this term are OVERFED (7 letters), SATED (5 letters), and SATIATED (8 letters). All three words mean to be filled to the point of satisfaction, but they differ in intensity. OVERFED implies being filled to an excessive degree, while SATED and SATIATED suggest being filled to a more moderate degree.