Im seeing the skeleton head with what appear to be fangs. Can someone please explain what that is or what it represents?
Are you talking about this?
If so, that is the PUNISHER logo from the Marvel comic THE PUNISHER, about an ex-military guy who seeks revenge by taking out bad guys.
Certain special forces units (SEAL Team 6, I think) wear it as a badge on their uniforms.
Q has adopted it as a talisman. It usually means PAIN.