A pun on 'Swan Lake,' the famous 1876 ballet by Pyotr Ilyich Tchaikovsky, combined with 'swine' (pigs) for the Halloween costume.
↗ Read on WikipediaMentioned once in The Unnatural.
The Unnatural
Season 4 · Episode 16 · S04E16
“We finally had to take to telling that we were "Swine Lake." They didn't get that either.”
From the same episode and category.
“My eight year-old son is visiting me this weekend, he asked specifically if I could arrange a tour of the Microsoft…”
“a young girl living in Wisconsin who wanted desperately for her mother to drive her to Chicago to see Bobby Sherman…”
“That Halloween we went as "The Bay of Pigs."”
“Abraham Lincoln! What school did you go to?!”