How to say I'm hungry, nay, I'm starving! in Japanese

And how to say I'm stuffed too...

Starving Phrases

お腹(なか)がすいた

I’m hungry [In conversation, the が can be dropped. This is the most standard and safest way to express hunger.]

腹(はら)へった

I’m hungry [はら is another way to say “stomach.” This can be rude in some situations. Mostly only used by males among male friends. Literally, “stomach decreased.” Notice it uses the same kanji (stomach) but is pronounced differently.]

お腹(なか)へった

I’m hungry [The same as above, but less rude and with お腹(なか) instead of 腹(はら)]

お腹(なか)ペコペコ

I’m hungry [A cute way to say it. This sounds childish, but could be a fun way to express hunger.]

Stuffed Phrases

お腹(なか)いっぱい

 (I’m) full [Stomach full]

満腹(まんぷく)

(I’m) full. [Also, stomach full; 満 full 腹 stomach]

もう食(た)べられない

 (I) can’t eat any more [もう (any more); 食(た)べられない (to be not able to eat)]

腹八分(はらはちぶ)

 [This literally means “stomach 80%.” It is used when you are almost full, but not stuffed. It is the proper time to stop eating.]