Here are the possible solutions for 'twas on they slew him lanier clue
Answer
Clue
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atree
Clue
"'Twas on ___ they slew Him": Lanier
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"