This refers to the gizzard, a thick muscle in a bird's digestive tract used to grind food. In Mexican cuisine, it is a common ingredient used for various stews or snacks (botanas).
I went to the market for a kilo of chicken Molleja to cook them in green sauce with some cactus pads (nopales).
Used to describe a person who has a lot of skin folds or wrinkles, usually due to aging. It is a slang way to say someone looks extremely wrinkled or shriveled (the term literally refers to a gizzard, which has a textured, wrinkled surface).
Uncle Luis did not protect himself from the sun at all and now he is a total molleja, his face is full of lines.
A regional exclamation from Maracaibo used to express surprise, shock, or emphasis (Maracucho refers to people from the city of Maracaibo, known for their distinct slang).
Informal Colombian slang for the head. It is frequently used in casual contexts or to describe hits to the head (in standard Spanish, the word refers to an animal gizzard).
That kid hit himself against the door frame and now he has a huge bump right on his molleja.