above (one's) head

Being too advanced or difficult for one to be able to comprehend, understand, or complete; beyond one's abilities. I thought I could handle this advanced math class, but the stuff we're learning is just way above my head.

Common Names:

Name	Pronounced	Usage
Slavica	-	Serbian, Croatian, Slovene, Macedonian
Florinus	-	Late Roman
Ketill	-	Ancient Scandinavian
Mccollum	[mə'kɔləm]
Epaphroditos	ee-paf-rə-DIE-təs (English)	Ancient Greek
Wilton	['wiltən]