to have it on lock
have
hæv
hāv
it
ɪt
it
on
ɑ:n
aan
lock
lɑ:k
laak

英語での「have it on lock」の定義と意味

to have it on lock
01

to have complete control, mastery, or confidence over something 

俗語
She has it on lock when it comes to project management. 
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