A fuckinglongtime? Either that or a megaannum, MA for short.
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What does megaannum mean? - definitions
Jan 5, 2022megaan·num Here are all the possible meanings and translations of the word megaannum. Did you actually mean manna gum or meniscium? Editors Contribution (0.00 / 0 votes) Rate this definition: megaannum adverb A million year. 2 megaannums = 2 billion years. Etymology: A million year. Submitted by khanh_n on January 5, 2022