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1.
When you have an upset tummy so your poo resembles wee and makes your bumhole burn like hell. Also see diarrhea.
Everybody avoid the toilet - that chicken madras has given me a bad case of wee-poo.
by Sarah Lou July 17, 2006
 
2.
When your faeces comes out with the same consistency of urine. Dehli Belly
Tourist 1 "That Indian street food was delicious"

Tourist 2 "Yeah, but in a few hours you're going to have the biggest weepoo ever"
by GoatHerder April 01, 2009
 
3.
to poo and wee at the same time
i need a weepoo
by richspur February 29, 2012