a manta

1.
SpainLatin Americawidespreadinformalcolloquial
- In great quantity; plentifully; in abundance (used to indicate a large number or amount of people, things, or occurrences).
- Frequently used as an adverbial phrase to emphasize that something exists or happens in excess or profusion.
2.
SpainLatin Americacolloquial
- Used as an emphatic intensifier meaning 'very' or 'extremely' in informal speech.

Examples:

ES: - Lleva funcionarios a manta.
EN: The L48 taking the employees to the depot.
ES: Hubo caídas a manta.
EN: There have been many arrests.
ES: Por aquí hay delincuentes a manta.
EN: Some bad elements around here.
ES: - Vendrán clientes a manta.
EN: - We're gonna be swarming with customers.
ES: Llevo dinero a manta y listo para gastar.
EN: I've got a bunch of Susan Bs jingling in my pocket and I'm ready to spend 'em.
ES: Porque sabe a manta de caballo.
EN: 'Cause it tastes like a horse blanket.
ES: Y sabe a manta de caballo.
EN: Tastes like a horse blanket.