(As) big as (the [approximate] size of) a fist, (approximately) fist-sized / (colloquial) blatant, blunt, downright, outright, plain / (colloquial) full-blown, huge, massive, significant

(colloquial, idiomatic) to be a crafty, sly devil/fox, to be a sly dog, to be sly as a fox (be crafty, sly, or occasionally impish and punchy in spite of one’s harmless, innocent, naive appearance) (of people; more rarely, of animals) / (colloquial, idiomatic, figuratively) not to be as harmless, innocent, naive as it may seem at first glance; not to be underestimated (of things and abstract notions)

superlative degree of faustdick

inflection of faustdick:
/ inflection of faustdick:
/ inflection of faustdick:
/ inflection of faustdick: