Here are the possible solutions for no more mercy in him than there is milk in tiger shak clue
Answer
Clue
Relevancy
amale
Clue
"No more mercy in him than there is milk in ___ tiger": Shak.
neko
Clue
Rocker Case who tweeted "If a dude called me a 'cougar' I'd be more likely to kill him bare-handed and shit him out in front of his parents than fuck him"
ecological
Clue
Environment-related, like the lyrics to "Mercy Mercy Me"
Definition
relating to ecology, also ECOLOGIC, OECOLOGIC, OECOLOGICAL