1: term used to describe a person so mentally wily and clever that they have the ability to see through any scheme or ruse.
2: being able to think many steps ahead of an adversary
you-know-who asked to borrow my car to run to the grocery store.
i would advise against that
she’s looking for someone who will lend her their car so she can drive to mexico. she’s testing you to see if you are susceptible
omg! that makes so much sense! you saw right through her plot. you are so totally mastermindish! thank you!