1. A deep, profound lonliness that can only be filled by the company of a member of the opposite sex.
2. The period after the end of a relationship when the person(s) are tired of being alone
Guy1: Man, its been 2 months since she broke up with me and i got singleitis
Guy2: Dang, that sucks...
1. to stick to your own opinion, despite criticism.
Guy1: LeBron James sucks.
Guy2: No he dosen't, I'm "Ridin' with Garlic Jr."