When a person uncontrollably vomits and shits simultaneously.
"Oi James! I heard Andrew pulled a ' Poo Spew ' last night at Beth's 18th!!"
She gave me blue balls so i gave her a spewing clitoris in return
When you talk too damn much. Or when what you are saying is so ridiculous that cabbage falling out of your mouth rather than words would be more believable.
Olivia is spewing cabbage again. That hard boiled cabbage. She's nuts.
VERB- The morning bathroom trip after a long night of drinking where you will have to grab the garbage can to puke into whilst explosive crapping your taco bell.
TL;DR-puking and shitting at the same time.
Hey Man, How you feeling.
I'm not feeling so well.
You alright?
No, I just had a nasty dook n' spew all over my bathroom.