1. Something that spoils the fun for everyone else.
2. A person that points out a flaw in the plan that everyone else is excited about.
3. A person who refuses to have fun when everyone else is.
4. A person who intentionally diverts the attention away from something fun by creating unnecessary drama.
Dave's bad news ruined the party for everyone else last night. Why did he have to be the poop in the punch bowl?
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.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.