The phrase "unrealistic deadlines" means being given very short or impossible time limits to complete a task.
Sentences with «unrealistic deadlines»
Clients can often demand a quick turnaround and put pressure on you to set unrealistic deadlines. (creativeboom.com)
Far too often, they create unrealistic deadline they can't possibly meet. (kevintjohns.com)
They also complained about solicitors not keeping them up to date with progress on the case, failing to provide all the necessary documents, providing poor instructions and setting unrealistic deadlines. (newlawjournal.co.uk)