The Rice University Neologisms Database

contraction meaning “for sure,” showing certainty Easier way of blending two words together to make one that just flows together. Many slang words these days are fomed from blending or slurring words together for convenience and better rhythm. The two parts of the word are also used independently as 'fo' is often used instead of 'for' and 'sho' for sure. Also possibly created for better rhyming in rap songs. Most often heard in hip-hop cultures and amongst teens in any situation. Fosho is considered informal and slang.