The right way of saying it is "Hamein Intezaar karne ki aadat nahi hai" it means "I am not used to wait for some one", Generally "Hamein" is used for a group of people - Literally but in certain places people say this for a singular person. Main for singular and Hum for plural (we = Hum) (I = Main), but in certain places in India and in certain way of talking we use hamein for singular person. So. Hamein - (in a royal sense ;) you can also say mujhe) intezar = Wait karne ki aadat (habit) nahi hai = Not used to "I am not used to wait for some one" or "I am not habitual to wait" the second one is more appropriate :) Hope this will help.

First a little Correction Ami KO entzar karni ki adat nahi hai Literally it means "Mother doesn't have the habit of waiting" Equivalent English Translation would be - Mother is not used to waiting Ammi - Mother Interzaar - Wait (noun) Interzaar karna - To Wait Ki - of Aadat - Habit Ki Aadat nahi hai - is used to mean Not used to Eg. Mujhey Zyada baat karne ki aadat nahi hai - I am not used to talking much or I don't talk much.