big fish in a small ponded

(/bɪɡ ˈfɪʃ ɪn ə smɔːl ˈpɒndd/)

adj.

Experiencing slowed speech caused by alcohol.

Upon finding a park bench to sit on, Juliocesar leaned back and stared up at the stars, feeling strangely big fish in a small ponded.

Source: Wiktionary