call it for the day!!???

My teacher wanted to get rid of us today in class. So, she said something like " let's call it for the day if you guys don't have any questions". I didn't exactly what she said " call it for the day"!!??

The correct expression is "Let's call it a day," which is an idiomatic phrase meaning (in essence) "let's stop what we're doing, and go home/leave for the day."

This is another one of those idioms that can be made sense of when torn apart by the witty.

Teacher fond of the odd idiom: "Let's call it a day."

Student fond of badgering him: "Call what a day?"

Teacher fond of the odd idiom: "Call whatever we've been up to till now a day."

Student fond of badgering him: "... 'up to'?"

Teacher fond of the odd idiom: "'Doing' ... Let's call what we've been doing until now a day."

Student fond of badgering him: "Then what do you mean by 'a day'?"

Teacher fond of the odd idiom: "You know, 'a day's work', 'a day's worth of stuff to do', 'the day's lesson'."

Student fond of badgering him: "Call what we've done up to now the day's lesson."

Teacher fond of the odd idiom: "Yeah, that's it. That's the day's lesson. It's done, finished, over."

Student fond of badgering him: "So, we can ..."

Teacher fond of the odd idiom: "Go home."

Student fond of badgering him: "So, you mean ..."

Teacher fond of the odd idiom: "Right, I'm charging you over-time."