This is the 7770th most frequent German word.
haufens
The word "haufens" does not exist in standard German. You may mean "haufen," which translates to "pile" or "heap" in English.
In this context, 'Haufen' refers to a quantity or a pile, metaphorically used to describe a large amount of work.
Ich habe einen großen Haufen Arbeit heute.
I have a big heap of work today.
Here, 'Haufen' denotes a literal physical pile of leaves gathered in one place.
Der Hund spielt im Garten mit einem Haufen Laub.
The dog is playing in the garden with a pile of leaves.
In this case, 'Haufen' is used colloquially to mean a large number or group of people in an informal manner.