一頭熱

one-sided enthusiasm (abbr. for 剃頭挑子一頭熱|剃头挑子一头热[ti4 tou2 tiao1 zi5 yi1 tou2 re4])

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

one head / a head full of sth / one end (of a stick) / one side / headlong / directly / rapidly / simultaneously

head / hair style / the top / end / beginning or end / a stub / remnant / chief / boss / side / aspect / first / leading / classifier for pigs or livestock / CL:個|个[ge4]

suffix for nouns

to warm up / to heat up / hot (of weather) / heat / fervent

lit. only one end of the barber's pole is hot (idiom) / fig. one-sided enthusiasm / one party is interested, but the other, not so much / (Note: In former days, street barbers carried their equipment on a pole, with tools and a stool at one end and a brazier at the other.)