I am a devoted reader of Do the Math, Ethan Iverson’s blog. (He’s the pianist in The Bad Plus, and an absolutely remarkable writer on various aspects of jazz and other topics.)
On a couple of posts he’s used the word “hit” as a synonym of “gig.” Example (rough paraphrases): “We had a good hit last night in Philly” or “...the last tour involved a few hits with Joe Blow on guitar.” Is this a newer slang expression? An older term I’ve somehow overlooked? I’ve done a fair amount of reading about jazz (books by or about Miles, Coltrane, Mingus, interviews and oral histories, etc) and have some experience as a (very) amateur musician, and yet this usage is completely new to me. And I’ve combed through several standard online dictionaries/thesauruses and lists of jazz slang, and nowhere do I see “hit” defined in this way.
I’m also going to post this to a jazz discussion forum.