黑衣牛仔帆布鞋我是你大爷
[hēi yī niú zĭ fān bù xié wŏ shì nĭ dà yé]
It's quite humorous, using casual clothing style to imply 'hip/cool dude' image; at last, the term 'Da Ye' means a form of kinship title used by juniors to address the senior male relatives older generation but the word itself also carries humorous undertones meaning ‘boss’ when talking to peers.