Someone who is in love with marching band, and concert band. They want to devote most of their time to their band. They are true to form if all they talk about is band. They play any instrument in band from tuba to flute. They tend to hang around people who are a lot like them. Band is something they want to die doing, they can't be stopped. Their life revolves around band.
That girl is so addicted to playing the snare drum, she's a real bandgeek.
a renaissance man (person) that is especially (surprisingly) well-versed in geekculture.
That charming musician/mathematician/magician who works as a policy analyst at the centre for inclusive society just walked into Comicon wearing vintage Nike Air Jordan sneakers!: whatta renaissance geek!
One who possesses knowledge pertaining to films that many may find extraordinary, and are usually good filmmakers, graphic designers writers. Besides film Film, Geeks are usually are good with tech in general.
Random person: Hey bro I heard you're like a film genius!
Film Geek: Speaking of geniuses I assume you have seen Jaws? Well did you know part of the reason the cast had time to improvise was because the robotic sharks kept breaking down, halting production. Named “Bruce” after Spielberg’s lawyer, the sharks relied on a complicated series of pneumatic pumps that kept getting fried by the sea water. Breakdowns became a daily occurrence. Undeterred, Spielberg had the actors improvise their scenes while he wrote the dialogue into the script. The impromptu workshops proved a success, resulting in fully developed characters that enraptured audiences — all thanks to faulty props.