A load of crap is literally just a whole lot of shit. It is often being used to for example this:

Dammit! My computer won't work! Stupid load of crap!
load of crap
by The_Shadow October 30, 2013
It is a nice replacement for "A load of shit"
"Wow, that is just a Croc Load of Crap!"
by champsammy13 March 28, 2008