A cross between the name "Glenn" and "Menstrual" used to piss off, irritate, or simply make fun of those named Glenn. Irrational and unreasonable behavior ocurrs randomly to those inflicted with glenstration. Variations include glennstrual, for those who are really anal. Only applies to Glens between puberty and glenopause.
by B&S April 2, 2008
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by oogle boogle April 27, 2006
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A place of immoral breeding. A place of great wealth but little consideration. Glenstal Boys are young delinquents whose parents have much in wealth and little in standards.
I was in Glenstal Abbey School the other day and I witnessed a boys mattress sailing out the window followed by what appeared to be all of his belongings.
by Air Dingus May 14, 2020
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