And the beauty of this word is that it does not only refer to a type of food but it can collocate with some other English words to enrich your vocabulary with some interesting meanings.
So when you are at the dentist’s for example, sitting out there in the reception, hearing horrible screams coming out from the doctor’s room, you may say:
Damn, now my knees are like jelly. Damn, now my knees feel like jelly.
يخربيت كده أنا ركبي سابت.
And away from dentists and doctors, imagine that you are trying to convince someone that fizzy drinks are harmful and he/she refuses to believe you. You do your best, displaying reports, playing some videoed interviews with experts, etc. And nothing works. So you say:
Convincing him that fizzy drinks are harmful was like nailing jelly to a tree/the wall.
مسألة إني أقنعه إن المشروبات الغازية مضره ده من رابع المستحيلات.
But what if you had an exam and you were not ready at all, you might say:
When I looked at the exam paper, I was shaking like a jelly.
لما عيني وقعت على ورقة الامتحان ركبي كانت بتخبط في بعض.
Damn, I guess I heard my wife calling, I have to leave now. I know that persuading her that I am on my own writing an article about jelly will be like nailing a jelly to the wall. 😂😂😂