"I bahns" is a phrase commonly used in Jamaican Patois to indicate dismissal or rejection of a statement. There are various synonyms that can be used to convey a similar meaning, such as "nah bother" or "nuh inna it". These phrases also suggest a lack of interest or engagement with what has been said. Other synonyms may include "mi nuh business" or "mi nuh inte-rest". These expressions indicate a disregard for the topic being discussed and a desire to move on from the conversation. Overall, there are many synonyms that can be used to convey a dismissive or disinterested response to a statement, depending on the context and dialect.