An incomplete reference to your father, mother, your entire family and your ancestors there-of. Used as a mild, less offensive version of such expletives that may invoke your immediate and extended family.
Nitin: "Good morning, Vicky uncle. You have to go for the Monsoon session in Parliament today."
Vicky Uncle (groaning): "Teri tho!"
Added 2011-09-25 by GoodCumbany