Seems like the custom of couples spending it together took hold during the 1980 economic bubble!
It's actually like that in Japan.Hey guys! Christmas has arrived again this year!Bob-*mb army in Christmas disguisesI'm ready to blow up normies at any time!
リア充 (riajuu) is not technically a 1 to 1 with "normie", but it's the closest I could think of. It refers to people satisfied with their real life (particularly, those in romantic relationships).
リア充爆発しろ (or any variation thereof —lit. go explode, riajuus) is a common expression to express disgust (or envy) towards riajuus.