C’est parti is a French expression that translates literally to “it’s left” and means “And we’re off!”, “Here goes!” and “Here we go!”. It is used to signal the start of an action. Vous êtes prêts pour la leçon? C’est parti! C’est parti ! And we’re off! / Here goes! / Here we go!
Du coup is an informal expression commonly used in spoken French and translates to “so” and “as a result”. It is a verbal tic or filler word and is popular among young people. A synonym is et donc (so, consequently, thus). Du coup so, as a result