Stimulating the clitoris either alone or with a partner or partners with a citrus fruit with a rind, such as lemons or oranges.

when you're hungover as shit after a spending a night drunk as a skunk

When your cat goes absolutely mental for half an hour at 8pm on the dot every night.

to zest: to vibe so hard it “zests” good vibe energy onto surrounding people; tangy vibes