A request for something, particularly a cup of tea or coffee, especially if the person to whom the request is made is walking by the kettle, coffee machine, etc. From If you are making a drink, I'll have one with you. Originates from one C (K) Leong. Example: Person sees other person walking into the kitchen, calls out Witcha!
WITCHA
Meaning of WITCHA in English
Slang English vocab. Английский сленговый словарь. 2012