A defeating sadness participants receive when it is discovered there is no more condoms left right before engaging in intercrourse. Symptoms include frustration, angst, unfufillment, and most notably blue balls.
Brett- Did you hook up with that random from the bar last night?
Steve- No man! I ran out of condoms and got rubber sadness. I couldn't risk it, so instead I had her give me a blow job.
Brett- That's the way to go. Rubber sadness is the worst!