VERB: to toubab (usually in matters of price and money) is the action of treating an individual or group differently due to nationality/appearance on the basis that it would be beneficial to the toubaber to do so. When toubabing has taken place, the recepients are often inconvenienced and regretful of the actions that led them to become toubabed and therefore are more wary and cautious to avoid such actions in the future.
S: Tell her to fuck off, she's toubabing you!
S: We bought our flavoured drink sachets for 200cfa.
A: Oh nonono... this is shit. I paid 175cfa per sachet! You got toubabed!
S: Damn it! I shall not return to that toubabing establishment.