The term 'side of bacon' refers to a large portion of bacon, usually cut from the belly of a pig. The crossword solutions for this term are GAMMON (6 letters), FLITCH (6 letters), and SLAB (4 letters). GAMMON is a cured, smoked, and sometimes boiled cut of bacon, while FLITCH is an uncured cut of bacon. SLAB is a large, thick cut of bacon. All three terms refer to a side of bacon, which is a large portion of bacon cut from the belly of a pig.