The two verbs in a row, пойдџ куплє, corresponds to English 'I'll go and buy'.
Пћсле обљда ї пойдџ куплє сІру. After dinner I'll go and buy some cheese.
Other verbs of motion can be used in similar phrases, e.g. Пољду посмотрє "I'll go and look," Сбљгаю позвонє "I'll run [to the phone] and make a call."