Originated from the Arabic language. A Gahbah is, mainly a woman, who enjoys and has a great amount/continuous interest in having sexual intercourse. It is used as an insult and is also used by many Arab-Americans and Arab English speakers.
Gahba a word used often in Kuwait (an Arab country) that means Bitch.
Gahba can be also spelled as 'Ga7ba'
Notice the number '7' Arabs use numbers to pronounce letters that are not included in the English alphabet Basically 7=Ha
a rough 'Ha' as if you were going to choke