in fashion

in (some kind of) fashion

In a certain manner or kind of way (of doing something). Last week, in a rather surprising fashion, the usually conservative tech company announced it would be opening up its source code to allow aspiring programmers to rework their popular web browser in new and innovative ways. The team won the championship in dramatic fashion, scoring in the final seconds of the game.
See also: fashion, kind
Farlex Dictionary of Idioms.

in fashion

in style; current and socially acceptable. Is that kind of thing still in fashion? It won't be in fashion very long.
See also: fashion
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

in fashion

Also, in style. See under go out, def. 5.
See also: fashion
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • in (some kind of) fashion
  • in...fashion
  • how about that
  • How about that!
  • how about that, then
  • how about that?
  • how/what about that!
  • be so bold as to (do something)
  • be so bold as to do
  • drop a bombshell, to