verb/a.vwaʁ le.z‿jø ply ɡʁo kə l(ə) vɑ̃tʁ/
to have eyes bigger than one's stomach (to take more food on one's plate than one can eat); to bite off more than one can chew (to try to do too much; to take on or attempt more than one is capable of doing)
“Hé, tu veux un peu de ce gâteau ? On dirait que j'avais les yeux plus gros que le ventre.” — Hey, do you want some of this cake? It seems my eyes were bigger than my stomach.
Literally, “to have the eyes bigger than the stomach.”