1. One's girlfriend
2. One's personal issues and/or business
3. A non-carbonated beverage which can be made by mixing flavored sugar and water. Kool-Aid is owned by Kraft, but many generic types are sold.
1. "She's my Kool-Aid, back off"
2. "Get out of my Kool-Aid motherfucka!"
3. "Mom, may we please have some Kool-Aid to drunk?"