push the edge of the envelope
push the envelope = push the edge of the envelope
approach or extend the limits of what is possible – informal
This expression was originally aviation slang and related to graphs of aerodynamic performance on which the envelope is the boundary line representing an aircraft's capabilities.
1993 - Albuquerque - These are extremely witty and clever stories that consistently push the envelope of TV comedy.
push the edge of the envelope :
Idioms Index – Previous Page
