kicker
noun [ C ] uk/ˈkɪk.ər/ us/ˈkɪk.ɚ/
(SPORT)
踢球者;尤指美式橄榄球中专职踢球的球员
someone who kicks, especially a player in an American football team whose job is to kick the ball
(SURPRISE)
US informal令人惊讶的东西
something surprising
And here’s the real kicker - if you buy one you get the second one free. 这里是真正让人惊讶的：买一送一。