flea

as fit as a flea

in very good health

非常健康

a flea in one's ear

a sharp reproof

尖锐的批评；严厉的非难

she expected to be sent away with a flea in her ear.

她猜自己会被狗血淋头地骂走的。

a flea in (one's) ear

An annoying hint or a stinging rebuke.

讽刺：令人恼怒的暗示或尖刻的指责