SHOOTTHEBULL does not sound right. Shoot the breeze
does. And the latter means to chat, which does not suggest aimlessness. ("Talk aimlessly.)
JUMPTHESHARK is a new one on me. Perhaps it and SHOOTTHEBULL can be found in a dictionary of slang.
DORAG is a '70's expression which, I believe, meant wig or hat (sometimes "wig hat"). Didn't know it now means a rapper's hat. If so, I wonder if any cruciverbalist ever heard or read it.
I liked "Dictator's aide" for STENO.
I couldn't figure out what "Much of an orbit" was. I thought "arc." Then I found the answer was BIO, which made no sense at all --- until I realized "orbit" was "obit." I guess reading helps in solving Xwords.