から何も食べてない

haven't eaten anything since …

→ から
phrase Rare #38,711
haven't eaten anything since … The time before から tells when the person last ate. 食べてない is a casual contraction of 食べていない.
JA: 昼から何も食べてない。
EN: I haven't eaten anything since noon.

昨日から何も食べてない。

I haven’t eaten anything since yesterday.

昨日から何も食べてないんだ。

I haven't eaten anything since yesterday.

朝から何も食べてないんだ。

I haven't eaten anything since this morning.

実は、今朝から何も食べてないのです。

Actually, I haven't eaten anything since this morning.