We were on pins and needles - eravamo sulle spine (sugli spilli e sugli aghi) - On pins and needles” means “worried or excited about something”. Example: We were on pins and needles until we heard that your plane had landed safely.
“Yadda yadda yadda” means “and so forth”, “on and on”; something boring and repetitive. Example: Jenna told me every single detail about her trip - how big her room was, where she sat on the plane, yadda yadda yadda.
Rat race is a way of life in modern society, in which people compete with each other for power and money. Example: Sally is sick of the rat race. She’s going to quit her job in London and move to a quiet village.