- It uses the word “slay” as in “to kill” in a metaphorical sense, similar to the phrase “killing it”, to indicate someone is being very successful at something. Like “killing it” it equates killing something to succeeding at it.
slay(1)
verb; folk etymology repurposing
to be amazing at something, to be in some way fantastic
Etymology : A repurposing of “to slay” as in “to kill”
Source : slay, Wiktionary.org
Last modified: 29 November 2017