in transcursu, “by the way, cursorily” (lit. “in the running through, in a cursory mention,” from transcursus, -us, m., ultimately from the verb transcurro, -ere, “to run through”)
I really like that phrase. In reading Latin letters recently, I came across it for the first time; it is a fun synonym for the older, one-word expression obiter, “by the way, in passing” (often seen in the phrase obiter dicta, “things said in passing/on the way”). And I wanted to write something quick, basically, raptim (“in haste”), for y’all.