Originally Posted by I M Possible

Playing to the gallery: Aim to appeal to the popular taste
He always keep on playing to the gallery to get more money.

keep ones nose clean: Stay out of trouble
We should keep our nose clean if we want to spent an honorable life in the society.

to keep open houses: All visitors are welcome
Ahmed arranged an art exhibition and kept open houses for all art lovers.

the acid test to the grindstone: A conclusive test of value very hardly and contineously
He appears in many competitive exams for the acid test to the grindstone.

to have a finger in a pie: To be involved in a matter
You have a finger in the pie because you were with Asi when he murdered that person.

set ones cap: To attract a person of opposite sex
She failed to set his cap at Salman because he is a sophisticated man.

throw someone out: Expel someone unceremonously
He throw his child out because of his anger.