geek out
phrasal verbPart ofgeek
geek out — phrasal verb
1. to get very excited and enthusiastic about a particular subject that interests y
1.phrasal verb
Definition
to get very excited and enthusiastic about a particular subject that interests you deeply, often talking about it for a long time
Example
When Tamar met another fan at the comic convention, the two of them spent an hour geeking out about their favourite superheroes.
Esteban and his friends geeked out over the new telescope, staying up all night to test its features.