Tumbling upside down; somersaulting. / At top speed; frantically. / (usually with in love) Hopelessly, madly, to distraction, deeply, utterly.

Hopelessly smitten, madly in love.

Alternative form of in heat

present participle of head-butt

(idiomatic) To feel overwhelming sorrow, jealousy, or longing; to grieve.

Frank and candidly straightforward / Generous and kind / Emotionally receptive

A type of small, oily fish of the genus Clupea, often used as food. / Fish in the family Clupeidae. / Fish similar to those in genus Clupea, many of those in the order Clupeiformes.

amicable and friendly / kind, sympathetic and generous

(idiomatic) More complex or confusing than one can understand; beyond one’s comprehension. / (idiomatic) More than one can handle; too much (especially in over one's head).

(archaic) A bill of health that states that there is infectious disease present in either a ship, or its port of departure.