L'expression du jour est: "Faire
la grasse matinée!"
or "Faire la grasse mat'!". Translated literally, it is: "to do
the fat morning". It doesn't make sense of course! This idiom means:
"to sleep late in the morning".
You need to conjugate the verb
"faire".
Example:
J'ai fait la grasse matinée / J'ai fait la grasse mat'. I slept late this morning.
Tu as fait la grasse matinée / Tu as fait la grasse mat'. You slept late this morning.