1
A poompa la caca is when you're so full of crap you yell it at the top of your lungs like a f***ing lunatic.
My cousin yelled 'poompa la caca' in the middle of a church service and got excommunicated.
I told my teacher 'poompa la caca' during a math test and got sent to the principal's office.
My dog barked 'poompa la caca' at the mailman and now the mailman is scared of dogs.