Here is the SeinFAQ entry in reponse to this ongoing thread.
5.5 Delores? Mulva? Gipple? (or What was Jerry's girlfriend's name in "The Junior Mint"?)
During "The Junior Mint" Jerry realizes he doesn't know his
girlfriend's name, but he does however know that her name rhymes
with a female body part. Jerry and George think of a few names
that it might be such as Gipple (nipple) and Mulva (vulva). Jerry
calls her Mulva and the whole thing backfires and she breaks up
with him.
At the end of the episode Jerry calls out "Delores!", which rhymes
with clitoris. The pronunciation of this word has been under debate in
alt.tv.seinfeld for sometime. The entry for this word in Merriam
Webster Dictionary, located at
http://www.m-w.com/cgi-bin/dictionary is; Main Entry: clitoris
Pronunciation: 'kli-t&-r&s, kli-'tor-&s
Function: noun
Inflected Form(s): plural clitorides /kli-'tor-&-"dEz/
Etymology: New Latin, from Greek kleitoris
Date: 1615
: a small erectile organ at the anterior or ventral part of the
vulva homologous to the penis
- clitoral /'kli-t&-r&l/ or clitoric /kli-'tor-ik, -'tr-/
adjective In compliance with the pronunciation guide the word can be
pronounced two ways; one rhymes with Delores and the other rhymes
with "superstitious"."You can't handle the truth"