哥 [gē] n. Brother, oppa. This is a comic way for a guy to refer to himself with a slight sense of superiority.

宅的最高境界是什么,是大四了,哥昨天还在校园迷路了。

What’s the highest level of “Zhai” [an indoor lifestyle]? It’s that although Brother is a senior, Oppa still got lost on campus yesterday.