A "grand-master simp" is someone who makes simping their mastery, and tries to deny that they are a simp. typically that will be the head of simps in your friend group.
"Jake is the "grand-master simp" of our friend group"
"Yeah its a shame that he cant get a girlfriend "
A guy with so low self-esteem that he would literally do anything for any female attention, no matter what the cost, the consequence or any logical choice would be.
ChoiceNFTs is a Grand-Master simp that would do anything for his mooncunt goddess