 Unless you spent time on Martha's Vineyard, you may not know what a pinkletink is. Do you know what a pinkletink is, Grant? No. Is this like a little pink shell on the beach? No. A pinkletink is a little frog. I haven't spent time on Martha's Vineyard, but I came across this term the other day, and I really liked it. A pinkletink is a frog.