1.刷卡(shuā kǎ)
Pay by credit card.
我可以刷卡吗?
May I pay it by credit card?
2.砍价(kǎn jià)
Bargin;haggle with a peddle
我已经学会了每天在市场砍价。
I have learned to bargin in the market everyday.
3.靠谱(kào pǔ)
To be accurate or reliable in speech or action
我觉得这事不靠谱。
I do not think it true.
I like your site.