爆表
bào biǎo
This phrase is used to describe something being so explosive that it is off the charts.
If we break down the phrase:
爆: means to explode
表: means timetable/chart/watch etc
An example would be:
今日空气最差十城河北4席 石家庄邢台连续爆表
Jīnrì kōngqì zuì chà shí chéng héběi 4 xí shíjiāzhuāng xíngtái liánxù bào biǎo
This translates to: Today's air pollution index is the worst in amongst the 10 cities in ShiJiaZhuang, XingTai continues to explode off the charts.