衝動買いはやめとけ。
衝動買いはするな。
the action of restraining oneself from purchasing
to buy anything on the instalment system―on the payment system
to buy anything cheap―buy anything at a low price―buy anything at a bargain―make a good bargain
to go shares in the purchase―club together to buy anything―(二人でなら)―buy between the two―(三人以上なら)―buy among the five