Definition of nooks:
(n) :
A small corner formed by two walls; an alcove.
(n) :
A hidden or secluded spot; a secluded retreat.
(n) :
A recess, cove or hollow.
(v) :
To withdraw into a nook.
(v) :
To situate in a nook.
(n) :
(Homestuck fandom slang, vulgar) The vagina-like genitalia of a troll, featured in Homestuck fanworks but not in canon.