Green’s Dictionary of Slang

gutsful n.

also gutful, gutfull
[gut n. (1a) + SE full]

[1920s+] (orig. Aus./N.Z.) a sufficiency, quite as much of anything as one wants or cares to take; often as have a gutful.

In phrases

gutsful of grunts (n.)

[1910s+] (Aus.) an unpleasant person.