To have sex with an alien. In these terms clappingdoes not at all refer to slapping your hands together but instead the sound one makes while having sex.
This phrase became popular in 2019 when the Area 51 Raid was still popular. People used the term to mean that they would break into Area 51 and have sex with one or multiple aliens whilst there.
Person A: Imma go clap those alien cheeks during the Area 51 Raid
Person B: Rex that meme is dead get help
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.