mental block is a noun meaning "an inability to remember or think of something you normally can do; often caused by emotional tension". It carries one recorded sense.
an inability to remember or think of something you normally can do; often caused by emotional tension
“I knew his name perfectly well but I had a temporary block”
Definitions, synonyms and semantic relations for mental block come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.