Sex between two virgins, or just plain awful sex. Stems from poor knowledge or experience in sexual situations. Akward and unpleasant, both parties are left disatisfied and sometimes depressed.
Caity will still be having nub sex at age 32.
by Honest Justice May 27, 2006
The act of intercourse between two amatuer "nubby" people
Yo did you hear about that nub sex john had with his girlfriend?
by Matthew & Gary May 03, 2004

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