(informal, figuratively) to be peckish, to be a little hungry

it's a small world (used to express surprise at meeting an acquaintance or discovering a personal connection in a distant place or an unexpected context)

mighty oaks from little acorns grow

a little bird told me

(simile, colloquial) to have the time of one's life, to have a whale of a time, to enjoy oneself immensely

to be on cloud nine, to be on top of the world, to be in seventh heaven, to be over the moon

Alternative form of au petit bonheur

watch the birdie! say cheese!

(simile, informal) pissed as a newt; drunk as a skunk (very drunk)

my gut tells me, my gut is telling me / something tells me, something is telling me