Pasojo is the same as that in Colombia we call construction. It is manure from horses (in the form of large balls).
Indeed, in Zacatecas " pasojo " you're told so to waste of donkeys, horses and all horses...!
Name given to equine excrement in Jalisco.
Name given to the manure of the teams in the mountainous region in the Northwest of the State of chihuahua
Pasojo .conocido as a handful of dry grass or spite given feed cows
Pajoso = clods hardened as sharp stones.