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1.
NOUN

The appropriate mate for bridezilla, groomzilla is a combination of groom and godzilla, and describes an unreasonably demanding groom. Groomzillas rarely express themselves over the small details of the wedding ceremony and reception, preferring instead to force family members into uncomfortable situations or make vague general statements his bride must extrapolate from.

Groomzilla's attacks are often seen by his bride to be personal attacks on her, her ability to get along with her future in-laws, and her ability to plan a wedding.

This term is most often seen on wedding-related media, especially chat boards.
OMG, I can't believe my groomzilla wants me to spend six whole hours talking to his mother!

Groomzilla was last seen terrorizing Tokyo and demanding unreasonably-priced things for his small-budget wedding.
by Maryilee January 22, 2009
 
2.
The male equivilent to a bridezilla. A heterosexual man planning a wedding who becomes over-involved, demanding and outrageously hostile about small irrelevent details involved with the planning of the ceremony and/or reception. A Groomzilla is also known to insist on a wedding band for himself that is more elaborate and costly than his bride's ring. This type of Groom will insist that all details and choices must be decided by him, leaving the bride to parade countless options before him and watch "her day" become "his".
She absolutely loved that banquet hall, but her fiance didn't like the color of the dance floor, so he said no. I hope she knows she's got a groomzilla.

He's insisting his diamond be bigger than mine! He's turning into Groomzilla.

My future husband has become a groomzilla! My dream wedding is ruined!
by Raylan July 27, 2010