This is the 6955th most frequent Japanese word.
マシマシ
"マシマシ" means "extra" or "to add more," often used to request an increased quantity, typically in food portions.
Here, 'マシマシ' refers to adding extra quantities, commonly in a food context, such as increasing toppings or portions in ramen.
このラーメンはマシマシにしてもらえますか？
Could you make this ramen 'MashiMashi' for me?
In this case, 'マシマシ' conveys a significant increase or enhancement of a specific attribute, like stamina here.
体力がマシマシになった気がする。
I feel like my stamina has increased significantly.
Here, 'マシマシ' is used metaphorically to describe an enhancement or amplification of excitement felt from an experience, like watching a movie.