Shit + Tsunami= Shitnami. An urgent, sudden, copious, and explosive emptying of bowel contents. Often happens after a night of draft beer, boiled eggs and/or White Castles.
Kevin though his life was a bit of a shitstorm when his rental agent gave him notice to vacate his flat, but came to realise that he was in a shitnami when his dog Bozo was run over and killed by his wife when she left him for a famous Latino pornstar, lost his car and all of his money in a drunken poker night, was diagnosed with terminal penile cancer, and disowned by his mother for forgetting her birthday.
N. This describes when one does not wipe (in going to the bathroom) properly, and thus infestations of what was to be wiped are now pushed under the poor sap’s fingernail(s). (This term was begun by Artie Lange of the Howard Stern Show.)
“Yo Bill what’s that under your fingernail? You stupid ass, can’t you wipe yourself? Now you’ve got shitnail.”