Best definition
Yikaroonies is in response to anything, another way of saying “lol” oh “yeah” or “stop talking hoe” or “That’s embarrassing”

Lilly: I really like eating dick

Ken: yikaroonies lilly, yikaroonies
Yikaroonies: define #2
Expressing shock and alarm, often for humorous effect. Usually said when trying to impress someone with a cute, off-kilter, exclamatory phrase.
Dave: Did you get in?

Lauren: No, the line went around the block!

Dave: Yikaroonies!!