When the trousers/shorts/leggings of a person ride up into ones crack, resulting in a clearly visible outline of the persons butt crack. This can usually be seen on buses or other forms of public transport.
It origionates from the word 'cameltoe', but is the 'back' variation because it isn't asociated with the 'front' (vagina).
'I saw an epic bameltoe on the bus the other day, you could proper see the guy's butt crack!'
'Thats awesome, you should have taken a photo!'
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.