The informal U.S. abbreviation for guacamole noted by Wikipedia is “guac.”
“Guac” is a clipped form of guacamole used in everyday American English, especially in restaurant menus, food ordering, and casual speech. It shortens the name without changing what the dish is: an avocado-based dip, spread, or salad first developed in Mexico.
The longer word guacamole comes from Classical Nahuatl āhuacamōlli, meaning “avocado sauce.” It combines āhuacatl, meaning avocado, with mōlli, meaning sauce or mole. The dish has since become common in international cuisine, where recipes may include lime juice, onion, cilantro, jalapeño, tomato, or other additions.
“Guac” is not the same word as salsa or mole. Salsa generally refers to a sauce based on chopped or blended ingredients, while mole is a broader family of complex sauces. Guacamole’s defining foundation is avocado, even though recipes vary widely.