A turd that takes a lot of toilet paper to wipe away. The name derives from a felt-tip pen that always seems to have a little bit of ink left in it.
Man 1: Blimey, you took a long time in the toilet there, mate.

Man 2: Yes. It was a felt-tip poo and took half a bog-roll to wipe away.
by john1million February 23, 2014
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