The phrase "study at sleepy" could refer to studying while feeling drowsy or tired. Some synonyms for this could be studying while feeling lethargic, fatigued, or exhausted. Other words that may be used in this context include studying while being in a daze, dozing off, or feeling sluggish. Additionally, using phrases such as "study while feeling drowsy" or "study while feeling tired" could also be used to convey a similar meaning. To combat this feeling, it may be helpful to take breaks, switch up study locations, or consume caffeine in moderation.