scull crusher
n.— «An exercise like lying extensions or, “scull crushers,” as they are affectionately called, is more advanced.» —“Real Deal: Arm Yourself” by Jeff Thayer Hamptons Online Sept. 20, 2006. (source: Double-Tongued Dictionary)
Further reading
If someone urges you to spill the tea, they probably don’t want you tipping over a hot beverage. Originally, the tea here was the letter T, as in “truth.” To spill the T means to “pass along truthful information.” Plus...
The asthenosphere, as described in Brian Kevin’s Yellowstone and Grand Tetons National Parks guide (Bookshop|Amazon) is a gurgling sea of plasticized rock beneath the earth’s rocky crust. Asthenosphere derives from Greek asthenes...