Wiktionary
sockful
n. As much as a sock will hold.
Usage examples of "sockful".
What a Morpork citizen liked to have on his side in a fight was odds of about twenty to one, but failing that a sockful of half-brick and a dark alley to lurk in was generally considered a better bet than any two magic swords you cared to name.
It gave a shrill buzz, spun wildly with its wings creaking open, lunged vaguely at Rincewind with its vulture head and got another sockful of sand on the upswing.
Secretary, with all due respect, this doesn't amount to a sockful of shit.