Green’s Dictionary of Slang

to make a muddle.

1844		Westmorland Gaz. 2 Nov. 4/1: Perhaps nothin’ in natur’ is so dofficult as to tie a white cravat so as not to rumfoozle or sile [i.e. soil] it.
1853		Spirit of Times (Raleigh, NC) 26 Oct. 3/3: If he or she ‘rumfoozles’ the blossom, they righteously get bleeding fingers.