mollyrant
(noun) {molEE^rant} An indigant, sanctimonious and opinionated diatribe on the the stupiddity of an individual, corporation or organization. Mollyrant implies commentary of extended length and vitriputition which is often lengthy, seriallized or recuring in nature.
Whatever you do, don't mention the iPhone price cut in front of her; she'll just go on a total mollyrant.
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