Definitions

1. adjective

superlative form of ‘mashy’ or ‘mashy’ itself; having a texture that is rough and unsmooth to the touch or taste

“After eating the mashiest potatoes, I needed a glass of water to wash down the taste.”

2. superlative

the superlative form of ‘mashy’ or ‘mashy’ itself

“These are the mashiest mashed potatoes I have ever had.”