The northwest form of a Cleveland Steamer. It is critical that you eat a large quantity of Mexican food before preforming the Seattle Tugboat so that you have diharria. You then crap on the girl's chest and slide down with a "toot toot" noise, more like a tugboat.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.