bugger all vs null

bugger all and null both are nouns.

Word	Noun	Adjective	Verb	Adverb
bugger all	Yes	No	No	No
null	Yes	Yes	No	No

As nouns, null is a hypernym of bugger all; that is, null is a word with a broader meaning than bugger all:

bugger all: little or nothing at all
null: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

Other hypernyms of bugger all include aught, cipher, cypher, goose egg, nada, naught, nil, nix, nothing, zero, zilch, zip, zippo.

bugger all (noun)	null (noun)
little or nothing at all	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

bugger all (adjective)	null (adjective)
	lacking any legal or binding force