Left-upper part of FACS AD32 "bite" expression (biting and rolling lips inward). Appearance: You can see the teeth biting upper-left part of the lips. It can be used independently and in combination with "jaw open" (in the interval from 0 to 25%). It is very similar to FACS AU28 "lips suck".
This Control Curve is driven by MetaHuman Animator.
