donkey's years

“Ach, it just came to me: She hasn’t called me Daddy in donkey’s years,” said Dr. van Heerden, stirring three spoonfuls of sugar into a fresh cup of tea.

"I've been waking up at night. I've not been this stressed in donkey's years."

“I’ve been playing these same numbers for donkey's years,” she told The Lott.

"They had been together for donkey's years but just needed a gentle push from Juliet," Martin says.

Richard Stevens from Faversham in Kent said he's "gutted" Thomas Cook is in such trouble, because he's been coming on Thomas Cook package holidays with his wife and two sons for "donkey's years".