When an old man marries a young woman one could say it is "like putting a marshmallow in a piggy bank", insinuating that the man cannot get an erection so it will not go in a young tight pussy.
Did you know old man jones married that hot stripper? It must be like putting a marshmallow in a piggy bank.
Green Bay Packer Quarterback Aaron Rodgers' nickname. Given to him by Deion "Primetime" Sanders after a rout of the then top team in the NFC conference, Atlanta Falcons. His performance was simply amazing and nothing short of greatness. It was quickly touted as being one of the most stunning QB playoff performances of all time.
Used of something or someone unsuited to a given environment, placed there hopefully for well-intended reasons but left defenceless. From a decision by the relevant authorities in Dublin, Ireland in recent years to mount life-size statues of cows in various media and colours in outdoor locations throughout the centre of the city. The cows were soon vandalised, including one dainty little critter with an elaborate design of cut glass that was left, as you do, in one of the less salubrious areas of the city centre and promptly smashed.
She left little Johnny off at school to face the roughest class in the place, like a crystal cow in knackerland.