Also known as: Calf Crusher · Calf Crush · Leg Slicer · Hiza Hishigi
From the truck, your shin becomes a blade behind their knee: fold their calf onto it and the compression forces the tap — often available the moment they try to free their trucked leg.
Submission · Compression Lock · Gi & No-gi · Difficulty 3/5 · Usually learned at Blue belt
Starts from The Truck as the truck driver → ends the match (submission).
The details that make it work
Your shin or forearm wedges deep in the crook of their knee; their heel folds toward their butt.
Pull the ankle down while your wedge stays high behind the knee — the fold does the damage.
It appears mid-escape: when they kick to free the truck leg, the slicer is already half-on.
Where it goes wrong
A shallow wedge at mid-calf that compresses muscle painfully but never forces the tap.
How opponents counter it
Straighten the trapped leg before the fold
Roll toward the wedge to relieve the angle
Is the Calf Slicer legal in competition?
IBJJF: brown and black belt only. Legal in ADCC and sub-only.