The misspelling of "Win Streak". It is used do describe something in which you are winning in multiple streaks. Win Steaks always go great with Awesome Sauce.
winstreak, aka wincest, is a term in popular vr roleplay game "vrchat" to express when "vr families," a common social norm in the game, are involved in "vr incest," aka dating among the non-blood related "family'
"Me and John are dating now, guys!"
"Aren't you guyssiblings in VRChat?"
"Eh, Winstreak."