Hábnab. adv. [hap ne hap, or nap; as would ne would, will ne will; that is, let it happen or not.] At random; at the mercy of chance; without any rule or certainty of effect.
He circles draws and squares,
With cyphers, astral characters;
Then looks 'em o'er to understand 'em,
Although set down habnab at random. Hudibras, p. ii.