hot air / fever / enthusiasm

boiling water

flannel

(attributive use) general; universal / (military) a general; an officer of the most senior rank

熱(あつ)火(び)子(こ)に払(はら)う (atsubi ko ni harau)

flame burning intensely

a children's game in which a wooden stick driven into the ground is dislodged by sticks thrown at it

(dialectal, Tōkai–Tōsan, Kansai, Chūgoku, Shikoku and Eastern Kyūshū) (one's) side

(childish) bedwetting

(Internet slang) friend online