Catchphrase, Popular Word, Buzzword
Noun
りゅうこうご
どの流行語が、今年の流行語大賞にえらばれると思う？
Which popular phrase do you think will be chosen for this year's buzzword of the year?
毎年ほんとに色んな流行語が生まれるよね。
A lot of new catchphrases are born every year, huh?
ここ数年の間に、「ミーム」はインターネットでの流行語となりました。
In the past few years, "meme" has become a popular word on the internet.
You know that 流行 means "trend", so "trend" language means a popular phrase. Yolo! It could also be a catchphrase, a popular word, or a buzzword.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.