German:
* "Gaffel" (pronounced "ga-fel") means "fork" but could be used metaphorically to describe something messy and tangled.
* "Schlampig" (pronounced "shlam-pig") means "sloppy" or "untidy."
* "Unordentlich" (pronounced "oon-or-dent-lich") means "disorderly" or "untidy."
* "Schmutzig" (pronounced "shmoot-zig") means "dirty" or "filthy."
Yiddish:
* "Meshuggene" (pronounced "meh-shoo-guh-neh") means "crazy" or "foolish," but could be used to describe someone who is messy or unkempt.
* "Mishmash" (pronounced "mish-mash") refers to a jumbled mess.
* "Chazeray" (pronounced "kha-zer-ay") means "piggery" or "sloppiness."
* "Shmutsik" (pronounced "shmoot-sik") means "dirty" or "filthy."
While none of these words are perfect matches for the sound you're looking for, they offer some options based on the meaning of "untidy."
It's also possible that the word you're thinking of is a made-up word or a variation on an existing one.