somthing that is un-returned or one sided, most often refering to love. Unrequited love is one of the most dificult things to live with. Loving somone who you know will never love you back because they think your relationship is "platonic"... that really stinks.
"Nothing kills the taste of peanutbutter quite like unrequited love."
1. One who engages in oral sex with a male.
2. One who engages in oral sex with a male while simultaneously humming.
The origins of this word come from Sean and Joe, taken from the original Middle English word bage pipiere. It is said this way because the male anatomy can be compared to a bag pipe.
1. Your a fuckin bag piper steve.
2. Last night I was hanging out with that girl, and she totally bag piped me.
3. Lawanda was bag piping so hard last night that she got the "Eye of the Tiger" stuck in my wang.