The more they are around the person the more they act like them. What happens to a person the longer they are in a relationship and become infected with the significant others personality.
Poisonality noun ˈpȯi-zᵊn·na-lə-tē Toxic people whose personalities are adept at inducing negativity in others, esp. depression, inferiority, anxiety. People who are able to convince others that everything — including life itself — is meaningless.
My god! I spent an hour in the car listening to her spew about why the universe shouldn't even be here and that there's no point to anything. What a poisonality!
pour·son·al·i·ty
/ˌporsnˈalətē/
noun the combination of a person's or business's distinctive characteristics that are parallel to the qualities in a beverage
"she has the poursonality of a martini- she's comes on too strong for some, but is a classy addition to any party"
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.