A: Dolmuşu yine kaçırdın! (You are late for the bus again.) - B: Boş ver, zaten bugünkü ders öğleden sonra. (Don't mind it, today's class is in the afternoon.)

Yes, it means kind of "don't mind it", "skip it", "pay no attention to it", "don't dwell on this" You can use it in such a conversation, for instance; A: Dün erkek arkadaşımdan ayrıldım (I split up with my boyfriend yesterday) B: Boş ver. Aldırma (Skip it, don't pay much attention to it, -cheer up-)

A: Tüm biletler tükenmiş. (All the tickets have been sold.) B: Boş ver, gitmeye niyetim yoktu. (Forget it, I wasn't eager to go there.)

"boş ver" (literally: give emptily) may be interpreted as " 'give empty' rate - don't give any importance"

boş: 1empty, 2unneeded, time-waster, unnecessary, useless | vermek: to give