Given the context of musicians, I think this may be what they mean. I can't imagine they had vomiting in mind.

Webster Random's New Antiquated English Collegiate Dictionary of the Terminology, Vernacular, Idiom and Verbosity of the Modern Percussionist, Revised Edition.
(it's a slang dictionary) In the centuries recently past, particularly after the Storming of the Bastille, the educational standards of the earth have extended themselves to embrace more people than ever before. Nowhere is this less evident than in the time-treasured ignorance of drummers. Those heathen bastards talk in a manner befitting common gutter whores, speaking in strange, unwholesome tongues. The superlative lexicograhpic staff of Webster Random's, in conjunction with Percussion World, bring you the authoritative compilation of these bizzarre idioms. God Save the Queen.
- LOW-BROW PREFACE -
Huh huh... drum slang, and stuff! Cool.

Clam (clam) n. A mistake (someone who is making a lot of mistakes is said to be eating clam chowder)

http://www.geocities.com/exodus_ii/slang.html

comparing it to a stew?
...all kinds of ingredients mixed up in a mess?
Just a shot in the dark...seems like our fellow went creative in describing it.

it refers to the soup with bits and bobs (since late 70s)

Blow chow is American slang for to vomit. BLOW CHOWDER. Blow chowder is American slang for to vomit. BLOW CHUNKS. Blow chunks is American slang for to vomit. ...
www.probertencyclopaedia.com/ZBA.HTM

also found the following


The truth begins with the simple, if disappointing, fact that "chowderhead," meaning "a dolt or stupid person," has never had anything whatever to do with chowder, frozen or otherwise. Technically, "chowder" is any thick soup, but in practical usage the word usually refers to a mixture of fish or shellfish and vegetables in either a cream or tomato base. "Chowder" has its roots in the Latin word "calderia," which originally meant "a place for warming things," and later came to mean "cooking pot." "Calderia" also gave us "cauldron," and in French became "chaudiere." Our modern seafood chowder was invented by French fishermen, who traditionally threw whatever bits of fish or vegetables were on hand into a communal pot.

"Chowderhead," which first appeared in English in the early 19th century, is a direct descendant of a much older insult, "jolterhead" or "cholterhead," both dating back to at least the beginning of the 18th century. These in turn were based on the 16th-century derogatory term "jolt-head," which probably implied that the person in question had been "jolted" (and thereafter addled) by a whack to the noggin. Possibly with a big block of frozen soup.

this is a term adapted from the definition on Tandom house Webster's college dict. It means we dedicated too much tiem and effort that finally we did nothing. This term: engolosinar is from Colombia. I think it fits perfectly into that sentence. My professor told me that sometimes you have to elucidate the right word. Relax a little, you'll get it

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Note added at 1 day 4 hrs 6 mins (2004-02-29 06:58:42 GMT)
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Sorry, Random House Webster\'s College Dictionary. By the way, I am new to this so sometimes I read language: English and how do I know what is the target language?