The Oxford Thesaurus An A-Z Dictionary of Synonyms - sleepyadj.

1) drowsy, somnolent, tired, nodding, dozy, lethargic, torpid, slumberous, sluggish, oscitant; weary, fatigued, exhausted, Colloq dead on one's feet, (knocked) out, beat, US and Canadian pooped: All that exercise has made me sleepy. 2) boring, inactive, dull, quiet, soporific, slow, sluggish: He grew up in a sleepy little village in the Outer Hebrides.