Nookie, n.
Slang word for sex and sexual intercourse. Softer sounding and considered less coarse than some more popular profane synonyms for copulation, like fucking and shagging. Connotations of innocence, bashfulness and often playfulness.
Not to be confused with cookie (used as a sexual euphemism like 90 % of the vocabulary) or Wookiee (used for their sexual appendices in 90 % of Star Wars erotic fiction).