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An expression used by the groom-to-be's side of the family during a wedding planning to describe the bride's control-freak of a mother. If the bride is "Bridezilla," then her mother is "Mother-In-Lawthra" (a reference to Godzilla and Mothra of the old Japanese monster movies).
Hey, dude, you're lucky your fianceƩ isn't turning into a bridezilla.

True, but her mother's already a Mother-In-Lawthra.
by MILatino April 04, 2011
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