If I’m not mistaken, it’s a very informal and uncouth (rude) slang word used on the internet. It is used to refer to a woman’s breast. It is not a real word in the sense that it has a dictionary definition, but you might see it used on social media or in the lyrics of explicit English songs.
I recommend not using this word, as those familiar with its usage might find it offensive.
For reference, there is a website called urbandictionary.com which you can use to look up the definitions of slang words. You are much more likely to find an answer on there because not all English speakers—and especially not older ones— use or even know this word and words like it.