queso
noun
que·so ˈkā-(ˌ)sō 
: a dipping sauce of melted cheese and chopped chili peppers : chili con queso
The author was never told in her Texas elementary school that if she ordered queso … or chalupas once she left home, she'd get only a plateful of disappointment.
Pete Wells
Pete WellsThe Mexican-inspired chain is offering free chips with guacamole or queso to customers who purchase their first order on its new smartphone app. Aric Jenkins
Aric Jenkins
Word History
Etymology
borrowed from Spanish, "cheese," going back to Latin cāseus — more at cheese entry 1
First Known Use
1989, in the meaning defined above