The daily usage of proverbs in Yoruba society is gradually going into extinction especially among the younger generation. This paper, therefore, examines the uses of proverbs to discuss some selected criminal and deviant behaviours within Yoruba traditional knowledge. Twenty – four proverbs were selected using purposive sampling method under non – probability sampling technique. This involved eight proverbs on theft / stealing; nine proverbs on laziness; four proverbs on non – hygienic and five proverbs on adultery. The proverbs were presented in indigenous Yoruba language but were also translated into English language for proper understanding of the non – Yoruba readers. The proverbs were explained and the lessons they thought were elucida...