"I stayed up too late tonight. Tomorrow I'll have to pay the piper."
plastic: credit card(s).
"Oh, no! I forgot to get any cash! I hope this restaurant accepts plastic!"
pooped: very tired; exhausted.
"I went to bed really early last night. I was pooped!"
pop quiz: unannounced short test.
"You shouldn't have missed class yesterday. We had a pop quiz."
pretty (adv.): rather; somewhat.
"That car's pretty expensive. Are you sure you can afford it?"
pull an all-nighter: study or work all night without getting any sleep.
A: "You look really tired."
B: "I am. I pulled an all-nighter to get ready for the meeting this morning."
pull someone's leg: tease someone by trying to make her/him believe something
that's exaggerated or untrue.
A: "Wow! Carl has done some really amazing things!"
B: "Don't believe everything he tells you. He was probably pulling your leg."