LAST NIGHT ON The Simpsons, Bart made a reference to something called "crumping" as a way to win back the attention of his classmates, who now found the apparently orphaned Milhouse cool. (I'm spoiling nothing because it was an otherwise crappy episode.) Bart then started some sort of urban-style dancing of the You Got Served/"You Got F'd in the A" type. This failed to sway the other kids, whereupon Marge crows, "I'll crump with ya, Bart!" Whereupon Marge began doing the same dance.
For the first time in 18 years of watching the show, I had no fucking idea what they were talking about.
I thought maybe this had some connection to crunk, which I do know about (yet another sub-sub-genre of rap now immortalized by a couple of Dave Chapelle bits). Other than that, and the use of crump as an onomatopoetic noun in World War I for heavy artillery, I was drawing a complete blank.
I had to go online to unwrap this mystery. There, I learned that it's called krumping, and that it's indeed a form of dancing descended from breakdancing. How many other viewers got this reference, I have no idea. Not a moment destined to enter the long and varied halls of heavily quoted Simpsons moments, I'll warrant.
Still made me feel just a little old, though.