Spirk

A combination of the name Kirk and Spock from Star Trek. Can be used to describe their friendship or a romantic relationship between them, although primarily romantic.

Fangirl 1: oh my god, spirk is totally canon!
Fangirl 2: I know, I just love them together. It's like they're basically already together even if it isn't technical.

alternative way

Fangirl 3: Spock and Kirk are such great friends!
Fangirl 4: Yeah, they really care about eachother.