When someone tries to sell you something over the phone (e.g. a mobile phone), similar to infomercials on television.
The person will try to persuade you to buy their item, even if you try to tell them that you are not interested.
(*Fone = Phone)
These infonemercials are so annoying, because they waste my time & money.
The only reason I don't want a mobile phone, is because I can't afford one, despite these infonemercal's sugary slop.