sugar up verb6 •(informal) To add sugar to (something).I sugared up your coffee. •(informal) To ingest a large amount of sugar, e.g. in candy.The kids sugared up good last night. •(informal) To give sugary foods to others to eat.Please don't sugar up the kids tonight. •(informal) To make (something) more attractive; to touch up to add appeal.I sugared up my stories to get those guys on my side. •(informal) Synonym of suck up (to adulate or flatter).I don't wanna have to sugar up to Mr. Snyder. •(informal) To flirt with and give signals of romantic intent for the purposes of seductionShe's been sugaring him up for months. formssugared up · sugaring up · sugars up