Meaning of lóu:
lóu
喽
Noun
(bound form) subordinates in a gang of bandits
Nà gè dàgē yǒu hěnduō lóuluó tīng tā de huà.
那个大哥有很多喽罗听他的话。
That leader has many subordinates who listen to him.
Particle
(final particle equivalent to 了[le5]); (particle calling attention to, or mildly warning of, a situation)
Wǒmen gāi shàngkè lōu.
我们该上课喽。
We should go to class now.
Kuài kàn lóu, nà biān yǒu piàoliang de fēngjǐng.
快看喽,那边有漂亮的风景。
Look quickly, over there is a beautiful scenery.