Euphemistic form of what the hell (“why not, who cares”).

A severe form of hay fever in which asthma is one of the distressing symptoms of the later stage.

(sarcastic) Said as a retort to someone saying hey (any sense of the interjection), used to indicate that the speaker disapproves of the usage of the word "hey", perhaps due to a dislike of informal speech.

a small whirlwind, usually of short duration, that swirls hay pieces and parts to great heights

A hay made from saltgrass. / A hay made from any grass grown in salty or alkalli conditions.

A plant of the species Spartina patens, a cordgrass native to the Atlantic and Pacific coasts of the Americas.

The juice of hay extracted by boiling, used as food for cattle, etc.

plural of hay bed

A pile of hay, either loose or in bales, used as a bed.

Third-person singular simple present indicative form of hit the hay