“DYKI” stands for “Did you kill it” rephrasing it as calling someone “did you kill it” used as a nickname for those who talk about someone in a code name.
The phrase that people are obligated to utter when someone is portraying themselves in a dyke-like way even though they are a non-dyke (or won't admit they are a dyke).
The lesbian form of duking it out, in which two female sexual rivals have sex in a contest of stamina and determination. The term was coined by popular burrowing nocturnal mammal Lord Aardvark in April of 2018.
Ordy said something about a friendly and overt sexual rivalry between two of the characters, it ended up with them dyking it out.