On the latest episode of "Glee," twerking was elevated to new heights and Kurt and Rachel decided to get inked. 

Blaine's (Darren Criss) private cleaning and twerking time is exposed by Tina (Jenna Ushkowitz), who videotapes him and shares it with the class. Mr. Schuester (Matthew Morrison) tells him not be embarrassed because twerking is a form of free expression, as well as a great way to impress the judges at nationals.

Schue doesn't understand the implications of the suggestive dance, nor does he realize the inappropriateness of performing "Blurred Lines" down the halls. Sue (Jane Lynch) is furious, and tries to explain what the song is about to the group. She fires Schue, but he decides to go to the school board with an elaborate presentation about old dance crazes that everyone once thought were scandalous. The school board is swayed, and Mr. Schue is rehired. 

Marley (Melissa Benoist) exposes Jake's (Jacob Artist) cheating, and performs a version of "Wrecking Ball." Unique (Alex Newell) has her own issues: she isn't allowed to use the girls bathroom anymore and has to use the men's, where she is harassed by jocks. She then performs an affecting version of "If I Were a Boy."

The Glee guys want to go beat up the guys who harassed her, but Unique knows it would only make matters worse. Schue eventually offers Unique the choice the use the single-stall teacher's bathroom. Sue then offers up her own key to Unique if Schue gives up twerking. Schue agrees.  

In the Big Apple, Rachel (Lea Michele) and Kurt (Chris Colfer) decide to get tattoos. Kurt gets a tattoo of "It Gets Better" on his right shoulder, but sees that it was misspelled (which was due to his own spelling error). Rachel tells him she chickened out, and appears not to get one. 

He goes back to the tattoo parlor and fixes it to read "It's Got Bette Midler." Then Rachel goes into the bathroom and pulls up her shirt to reveal her own secret tattoo: the name "Finn" written in the same script as the necklace she often wore when she and Finn were dating. 

On the next episode, the "Glee" cast will channel iconic singer-songwriter Billy Joel. In "Movin' Out," Blaine and Sam (Chord Overstreet) will take a trip to New York City, which is where they plan to move after graduation. Sam will begin pursuing a modeling career and Blaine will begin thinking about college. Tyra Banks will also make an appearance. 

Watch the promo for "Movin Out," which airs Nov. 21 at 9 p.m. on Fox.