While performing anal sex, you pull your dick out and drop several "just-add-water" foam expanding dinosaurs into her open asshole. Then reinsert, pee in her butt and wait. Pull out quickly and a few of the dinosaurs will flow out like on a waterslide. The others will stay in there for a while eventually landing in another water pool... the toilet.

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.

While performing anal sex, you pull your dick out and drop several "just-add-water" foam expanding dinosaur capsules in her asshole. Then reinsert, pee in her butt and wait. Some of the dinosaurs will flow out when you're done. The others will stay in there for a while and give your wife/girlfriend a nice surprise the next time she TRIES to drop a deuce.