Green’s Dictionary of Slang

very much; usu. in ta muchly! excl.

1871		Fun 4 Nov. n.p.: The Policemans Complaint. Nay oft Im told Ive been deceived, And of my xs Im bereaved; So on the whole I muchly grieved By information I received [F&H].
1889		Music Hall & Theatre Rev. 16 Feb. 4/2: The audience cheered muchly and the ‘act’ went.
1890		‘Doss Chiderdoss’ ‘Influence and Conviction’ Sporting Times 25 Jan. 1/2: Suppose that you and I have been imbibing at the Cri., / With additional refreshment at Romano’s, / And are subsequently found, very muchly ‘on the bound’.
1903		Bulletin (Sydney) 29 Oct. 17/1: The noun ‘screw’ has been muchly annexed by the slanguage. As pointed out, a gaol-warder or railway ‘gaffer’ is known as a ‘screw’; a disagreeable, cantankerous old woman is generally referred to as ‘a regular old screw.’ Both manual and brain-toilers speak of their remuneration as their ‘screw.’.
1972		B. Rodgers Queens’ Vernacular 139: muchly (camp) exceedingly.
1988		McGill Dict. of Kiwi Sl. 83/2: pie good, pie on expert or efficient, good at, from Maori ‘pai’, good, ‘pai ana’, suitable; eg ‘That paint job was pie on, to muchly.’.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].