Tseytlin Share definition Flag a stupid woman that is in a constant state of PMS and ovulation. Wow, hes being such a TSEYTLIN! Does he ever stop PMSing? Tseytlin by LUEDERS>TSEYTLIN February 14, 2008 0 0 Get merch Get the Tseytlin mug. Buy Now — $32.95 See more merch