thick skulled
comparative of thick-skulled
/θɪk ˈskʌld/
adjective
- Stupid or slow to understand; not able to learn or grasp ideas easily.
- The teacher tried again, but the thick-skulled student still didn't get it.
- He's a bit thick-skulled when it comes to math.
- Don't be so thick-skulled — the answer is right in front of you.