party -> partay
sorry -> sorray
booty -> bootay
This effect is used for either one or both of the following purposes:
1) To sound "different". The extra delay of the additional "a" may be used to emphasize that word in a particular sentence. e.g. well SORRAAYYY, which puts emphasis on the word "sorry".
2) To sound ghetto. Certain phrases like "off the hizzay" are derived from slang terms associated with ghetto indivdiuals e.g. gangsters, thugs or their wannabe equivalents.
A (with -ay suffix): I'm going to cancun to get me some bootay!