/pop"top'/ , adj.
1. (of a can) having a top with a tab or ring that when pulled up or off exposes a precut hole or peels off the entire lid.
n.
2. Also, pop top . a can having such a top: drinking beer from a pop-top.
3. the top itself.
4. the tab or ring fastener, esp. when removed from such a can: a vest made entirely of pop-tops. Also called pull-top, flip-top .
[ 1965-70, Amer. ]