What does 打折扣 (dǎ zhé kòu) mean in English?

Card 28IC2 Level 2128/55
CARD28
PROGRESS51%
打折扣
dǎ zhé kòu
to give a discount

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d