Lip balm is an item applied directly to the lips either to heal lips that are dried or cracked, or to prevent dryness or cracking of the lips or damage to the lips from prolonged sun exposure.
Is it manly?
While men frequently carry lip balm about, there is a certain stigma associated with it due to a resemblance to the feminine cosmetic, lipstick. Due to this, some men are hesitant to use lip balm. It is used by men due to the benefits associated with doing so. However, it's often applied with the same sensibilities with which one would pick their nose; it's not wrong, but people often prefer to not let other people see them do it.