make bricks without straw
Verb
Meaning
make bricks without straw (third-person singular simple present makes bricks without straw, present participle making bricks without straw, simple past and past participle made bricks without straw)
(idiomatic) To accomplish a task without the proper materials or under unreasonable conditions; to do the impossible.
Examples
You can only acquire really useful general ideas by first acquiring particular ideas . . . You cannot make bricks without straw.
You cannot make bricks without straw.
You can't make bricks without straw.
You can't make bricks without straw.