Spanking the Monkey (1994)

Holy Oedipus Rex!  This hilarious dark dark dark dark comedy won the
Audience Award at this year's Sundance Film Festival and with good
reason.  No summer has ever been tougher (or funnier) than what
20-year-old Ray (Jeremy Davies) goes through while taking care of Mom
(Alberta Watson) while home from college.

Low-budget to be sure, be redeemed fourfold by a super script and sharp
performances by Davies, Watson, and Benjamin Hendrickson (as the
father).  Title refers to masturbation, one of the many taboos blithely
broken by first-time writer/director David O. Russell.

Move over Mrs. Robinson!

Grade: B+