twofer

發音:  US [ˈtufər] UK [ˈtuːfə(r)]
  • na.〈美口〉買一送一的貨品
  • Web半價雙戲票;可半價優惠;買一送一的兩張票
n.
1.
a special offer or arrangement by which you pay for one thing and get another one free