熊大熊二光头强
[xióng dà xióng èr guāng tóu qiáng]
These are popular characters from a Chinese cartoon series called Boonie Bears (《熊出没》), where 熊大 is Big bear(Brother Bear), 熊二是 Little bear(Tubby bear), and 光头强 refers to Logger Bald Strong (the logger antagonist). This user name reflects the person's fondness for these animated characters.