A person who is obcessed with using periods in Instant Messages. Typically uses improper grammar with the only punctuation being periods. In some cases, the periods come between words, as a comma would.
by MCV August 18, 2006
Get the periodisiac mug.The complete inability to remember the date of one's last period, most often coinciding with the moment one begins to question if one is pregnant.
She thought she was being funny when she asked, "Well you couldn't be PREGNANT, could you?!" but it sent me into a fit of periodesia.
by LilaMcD January 9, 2009
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