[StainlessS]

Does that exist at all?

Muchly:- http://www.yourdictionary.com/muchly

adverb
Muchly is defined as a very informal way to say very much.
An example of muchly is when you really want something.

Informal very much: used mainly in the humorous phrase thanks muchly

Usage notes
Often regarded as a misconstruction of adverbial much.

From The Concise Oxford Dictionary, Ninth Edition, 1995. [EDIT: Before the avalanche of weird new words added to dictionaries]

Muchly: Adverb. jocular [Middle English from muchel].

Gandalf might have used it muchly, then again, he might not have.

EDIT: And yet this one got by unmentioned,

thanx muchly

EDIT: Ref below post (for LigH).
Methinks: (dated or humorous) it seems to me. [EDIT: Methinks that Bill Shakespeare probably oft used both Muchly and Methinks, and also Oft]