Noun
tellin (plural tellins)
A marine bivalve mollusc, of the genus Tellina, that burrows in the sand, from where it siphons detritus.
As my mother used to say, when it comes to militaristic roles in foreign policy, you could throw 'em both in a gunnysack and there's no tellin' which of 'em would crawl out first. Source: Internet
And I'm tellin' ya right now, Pizza Nostra This is one of the best thin-crust pizzas in SF, hands down. Source: Internet