谁欺负俺光头强熊熊变绵羊
[shéi qī fù ăn guāng tóu qiáng xióng xióng biàn mián yáng]
In English, this could mean: 'If anyone bullies me, the mighty Bald Strong Bear (referring likely to a character from cartoons) can turn into a gentle sheep'. Showing contrast between tough appearance versus a docile or weak natured inside.