what is a tosser

According to the search results, a tosser is an offensive slang term used in the UK, Australia, New Zealand, and Ireland to refer to a stupid or unpleasant person. It is a derogatory term and should be avoided in polite conversation. The other definitions found in the search results, such as a person or thing that shows the existence or direction of a trend or someone who throws lightly, are not related to the offensive slang term.