large furoshiki; big wrapping cloth
Literally a large traditional wrapping cloth. The figurative sense (sense 2) derives from the image of spreading out a big cloth to wrap something grand.
See also: 風呂敷
When moving, I wrapped the futon in a large furoshiki.
Figurative use: exaggerated talk or grand promises, often with the implication that they are unrealistic. Common in phrases like 大風呂敷を広げる (to make grand plans or boast).
He always talks big, but never follows through.
The plan was such an exaggeration that nobody believed it.