This medieval parchment hole was cut to be shaped like a fish or an elongated capital Greek omega; then a flap was added around the 14th or 15th century, and the following words written on it in Middle French:

Moult deust bien tallier soller
Qui ci me sot si bien enter

Can someone out there translate this? A quick google search hasn't helped.

From this manuscript: https://gallica.bnf.fr/ark:/12148/btv1b8452617d/f74#