Handouts, generally monetary, to that one cheap (in many instances African) friend. These handouts can occur in all manner of events, such as nights out, takeaways, general day to day activities.
Etymology: "Mzwimb" is a combination of African countries such as Mozambique, Zimbabwe and Botswana; "aid" is taken from the famous Live Aid concerts held in 1985.
Friend 1 (After realising he is short on change to buy food after a night out): "Yooo, can you get this for me? I'll pay you back".
Friend 2: "You know you never gonna pay me back, this Mzwimbaid gotta stop man!"