Origin: when any mammal has died and is on its back, it is "tits up". Things have gone titsup, meaning, the animal/situation has fallen down/gone wrong.
"Star Wars I, II would have been great, but Lucas became involved and the story-line went titsup!"
ACME Broadband,a business broadband and voice-communications provider, went TITSUP across the country at 1500 GMT after suffering a double cable strike by construction equipment. It is still fixing the broken lines. Specifically, there was a dual cable break on Britain's East coast and the London area of their national network. The company are working hard to repair the damage, and restore services.