Question

我要吃饭，等一下在聊的英语怎么说？

Answer 1

it is time for me to have breakfast/lunch/dinner .wait a moment and i'll be back soon.
或 简单说 i have to eat now .i 'll talk in a moment

Answer 2

i'm having dinner/lunch/breakfast, can't this wait?
我吃饭呢，等会（再说）行吗

i'm eating, i'll talk to you later
我正在吃，待会再聊

can't i have a quiet meal?
难道我就不能安静的享用美餐吗
i need to eat,you can talk to me later（talk later）
我要吃饭，你等会再跟我聊（等会再聊）
视心情和饥饿程度随意取用，呵呵

Answer 3

got go for lunch或者dinner， be back soon

Answer 4

吃过了吗？这样的问题是私人一点的问题，问了他会觉得：你想请我吃饭么 还有我去吃饭了，你们慢慢聊 I'm going for lunch, enjoy talking. have

Answer 5

I'm off to eat, talk to you later.