Annaconya

n.

Heard in Mayo

A very large poo resembling a large South-American snake.

In use

Run sham, I'm after layvin' a mawsive annaconya in the jawx an' 'tis blocked up!

Posh English

Hurry old chap, I have just deposited a magnificent serpentine excretion in the lavatory and the plumbing is entirely incapacitated.