Smooch definition:to kiss.. See examples of SMOOCH used in a sentence. The meaning ofSMOOCHis kiss, pet. Definesmooch.smoochsynonyms,smoochpronunciation, smooch translation, English dictionary definition ofsmooch. Slang n. A kiss. intr.v.smooched,smooch·ing , smooch·es To kiss. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016... On the other hand, a smooch is a more passionate and prolonged form ofkissing, often involving the use of tongue and deeper physical connection. Smooches are typically associated with romantic relationships and are often seen as a precursor to more intimate moments.