Just remembered that some friends of mine in NZ (Dai-chan, Michi-kun and anyone who wanted to jam a la Phish) had a band called Akudeta, which means Meat Foam -or, 'the stuff that comes out of the broth/gravy', (is that right Nalika?)
灰汁(aku) is any foamy thing that comes out of edible things when boiled - can be of meat, fish, or veggies. In Japanese cuisine it's typically thought that removing the aku refines the taste of the broth - while on the other hand, macrobiotic cooking would not mind it.
Deta may just be the past tense of deru (come out, go out, get out).
When the boiled thing produces the foam, you'd say "aku ga deru/deta."
In vernacular, when somebody has a strong taste (fashion, personality, speech style, etc.), you can say "aku ga tsuyoi". (strong aku)