whale tail
n.— «A Hollister spy says the thong visible from the back of low-rise jeans is called a “whale tail.”» —“Daily Datebook” by Leah Garchik San Francisco Chronicle (California) Aug. 23, 2004. (source: Double-Tongued Dictionary)
Further reading
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...
To joner means to “bring bad luck to” or “jinx.” This term is a corruption of the name Jonah, the biblical figure who initially resisted a divine command. His presence on board a ship supposedly caused a great storm at sea...