muck
https://gyazo.com/beea6998ac2f03edc5e5cd16d4b72d58
noun
⦅くだけて⦆ (べとべとした)汚れ, 泥.
e.g. I'll just clean the muck off the windshield.
(動物の)ふん; 肥やし, 堆肥
⦅主に英・くだけて⦆ まずいもの; 無価値なもの, がらくた.
e.g. the muck that passes for music in the pop charts.
verb with object
…をしくじる, 台なしにする(up)
e.g. she had mucked up her first few weeks at college.
馬[牛]小屋を掃除する
…に肥やしをやる
PHRASES
British informal of low social status. British informal handle incompetently: e.g. it's useless now that they've made a muck of it.
PHRASAL VERBS
British informal behave in a silly or aimless way, especially by wasting time when serious activity is expected: e.g. he spent his summers mucking about in boats.
(muck about/around with) spoil (something) by interfering with it:
e.g. they did not want designers mucking about with their newspapers.
ORIGIN