hobbyhorse
Longman Dictionary of Contemporary English 5++LDOCE 5++hob·by·horse /ˈhɒbihɔːs $ ˈhɑːbihɔːrs/ noun [countable] 1 TALK/MAKE A SPEECHa subject that someone has strong opinions about and that they talk about too much 过多谈论[反复唠叨]的话题 I’m afraid safe driving isn’t Harry’s only hobbyhorse. 恐怕安全驾驶不是雅基唯一过多谈论的话题。be on your hobbyhorse Vicky was on her hobbyhorse again. 薇姬又在谈她的老话题了。2. DHTan old-fashioned toy made of a horse’s head on a stick 〔儿童夹在胯下当马骑的〕竹马，马头杆
Examples from the Corpus
hobbyhorse• Another excellent chapter deals with the greenhouse effect and ozone depletion, which Brennan admits is a personal hobbyhorse.Origin hobbyhorse (1500-1600) hobby “small horse” ((14-19 centuries)) (probably from Hobbin, a man's name, from Robin) + horsehob·by·horse nounChineseSyllable
a that strong has subject opinions someone Corpus
hobbyhorse
hob‧by‧horse /ˈhɒbihɔːs $ ˈhɑːbihɔːrs/
noun [countable]
I’m afraid safe driving isn’t Jaqui’s only hobbyhorse.
be on your hobbyhorse
Vicky was on her hobbyhorse again.
2. an old-fashioned toy made of a horse’s head on a stick
hob‧by‧horse /ˈhɒbihɔːs $ ˈhɑːbihɔːrs/
noun [countable] Date: 1500-1600
Origin: hobby 'small horse' (14-19 centuries) (probably from Hobbin, a man's name, from Robin) + horse
1. a subject that someone has strong opinions about and that they talk about too much:Origin: hobby 'small horse' (14-19 centuries) (probably from Hobbin, a man's name, from Robin) + horse
be on your hobbyhorse
2. an old-fashioned toy made of a horse’s head on a stick