push the envelope
US /pʊʃ ðə ˈɛnvəˌloʊp/
UK /pʊʃ ðə ˈɛnvəˌloʊp/
1.
to go beyond the usual or accepted limits; to innovate or experiment with new ideas
:
•
The company is always trying to push the envelope with its new technology.
•
Artists who push the envelope often face criticism before their work is accepted.