A nonquest is a (normally sexual) conquest that never actually happened. Often referred to in the past
tense, once you have entered the '
friendzone' with a person you thought you might have had a
chance of sleeping with.
'I wish I'd slept with her whilst I had a chance - she's my greatest nonquest'
Man
1: You remember that
girl that used to barmaid at the Ships Head?
Man 2: Yeah, she was fit - didn't you get it on with her?
Man
1: No, she was one of my nonquests.