Noun. A lowkey crush that's been consistent for years. You might be in other relationships or have overlying crushes on others but still maintain the background crush. You know you will never date your background crush but a voice in your head will always say "maybe." Usually some connection to childhood. You can marry a guy but still be like "I wonder how Dennis is doing".
"Wow, you and Dennis are so flirty. You should totally hook up with him!" "No, no, you can't just hook up with background crush. Imagine the emotional baggage"
Having a crush on someone but not a big crush you think that their cute but that’s not main crush. If you’re main crush rejects you then your back crush will be your new main crush.
Ralph is my crush but if he rejects me I just go to Mason who is my backup crush