What does API Limit mean?

API Limit meaning in Urban Dictionary

found often on blackberry curve (non-3G) products whenever attempting to login to twitter or any other apps, particularly in slow internet connection/EDGE areas.It is a misnomer the reason why this error message is displayed and not simply: no link with server. Maybe research will be made to the API (-set of programming instructions) that enables twitter as well as other apps to connect.It is believed by many people become something of an under-developed product and/or community.