not in it—
1. not engaged in smth. as partners, competitors, etc.:
- For the most part the faculty members were not in it [distance education programs] for the money.
2. (coll.) not worthy of comparison with the thing stated first:
- Have you seen his new BMW? The old Opel isn’t in it!
not with it—(coll.)
1. not fully alert and aware of what is happening:
- I forgot to stamp the letters I posted—I’m really not with it this morning.
2. not thinking or behaving in the most modern way:
- That teacher will never be popular with the students, he’s just not with it.
See also: beyond it / off it / out of it.