"fear of missing out" in terms of hooking up with somebody. hooking up for fear that the opportunity will not present itself again.

Someone who is promiscuous due to a "Fear of Missing Out" on sexual activities.

The term given to a person who suffers from FOMO (Fear Of Missing Out)

To act homosexual when you really aren't, usually to get attention.

a person who is sexually attracted (in most cases exclusively) to a certain female with a last name rhyming with Towman, but spelled with an F and more like the beginning of the above word. A common occurrence among GLOWers, CTYers, and MIT students.

Fear of missing out on sex.

a person who acts gay or lesbian