What is Nosp?
1.
not our sort of people
- a right numpty, complete keith or wrong'un any of which would pass as a nosp.
See
2.
Non Official Seeing Person/Non Official Seeing Partner
cf
That stage in a relationship where you kinda-have-something-going but you are not sure what.
Your friends say "is he/she your boyfriend/girlfriend" and you don't know.
Alternativly, a shag buddy.
"Tom and I? No, we're just NOSPs."
See