ladybug taint
n.— «There’s even a name for it—“ladybug taint.” The smell, which connotes green bell peppers or roasted peanuts, is produced by ladybugs as a defense mechanism. The chemicals they release, in a class of compounds called methoxypyrazines, are found in other animals and plants,» —“Not So Cute: New study shows that ladybugs produce a foul odor that is being found in wines” Winston-Salem Journal (North Carolina) Apr. 3, 2007. (source: Double-Tongued Dictionary)