Taking every tip to zip at the zip, I kip in a dip

• Greek sauce with yogurt and cucumbers
• Gyro sauce
• Sauce on a gyro (... first 2)
• Sauce made with yogurt and cucumbers

Wiktionary Word definitions in Wiktionary
n. An appetizer made from yoghurt, cucumber, garlic, olive oil, dill or mint; usually served with pitta bread and as a meze#English

Wikipedia Word definitions in Wikipedia
Tzatziki (, , or ; or or in Cypriot ) is a Greek sauce served with grilled meats or as a dip. Tzatziki is made of strained yogurt (usually from sheep or goat milk) mixed with cucumbers , garlic , salt , olive oil , red wine vinegar , and sometimes dill ...