Hello:
Heard something the other day which reminded me of a word from the DISTANT PAST.
Have tried several search engines to NO avail.

It sorta sounded as though it might be spelled as any of the following ...
 g-dem-ta-brust
 g-demp-ta-brust
 g-dempf-ta-brust
 ga-dempf-ta-brust
with the "g-d" pronounced as in "Gdansk"

Sorta got the idea that it was some food-stuff—possibly baked.

Possibly it was just another of grandfather’s word/phrases like
  "layover to catch meddlers".

Thoughts apprecaited..
Thanks,, /s/ Hugh