You shall not make a poetry cocktail out of Tennyson and Coleridge, and jam it down my throat; or I'll aroint myself.
It has been suggested that the singular expression, "aroint, thee, witch!"
Since 'aroint thee, witch,' is your creed, I think you had better try him.
That aroint is equivalent to away, begone, seems to be agreed, though its etymology is uncertain.
intransitive verb, c.1600, used by Shakespeare (only in imperative: "begone!"), obsolete and of obscure origin. "[T]he subject of numerous conjectures, none of which can be said to have even a prima facie probability." [OED]