(n) a male tank top (man + tank top; see mank top)
(v) the act of wearing a mank or mank top
ex 1 - Wow, what a nice mank! I wish I had one just like it. Your arms look awesome in that mank.
ex 2 - Dude, the weather is so nice today. I am totally going to mank it.
ex 3 - This party is totally a mankable occasion.