In Australia it means that you're in a lot of trouble, with no foreseeable way out.
"Oh man, I can't believe I lost my paperwork; that stuff took me hours and it needs to be in by tomorrow!"
"Sounds like you're up shit creek without a paddle, mate."
It is a Portuguese expression, translated to "desenmerda-te!", that is used when you want to say to someone that they're stuck in the mud and they need to sort their stuff out.
Nao ha comboio hoje? Vens a pe! Desenmerda-te! Tens deca vir ter - Is there no trains today? Come on foot! Unshit yourself. you've got to come here!
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.