A Purse Word is a tern of phrase used in certain regions or demographic groups. The words themselves will usually be different depending on the people group using them and are used often in non formal communication. The words are as common as change from ones purse.
"Why don't Y'all come on in fer supper" -Granma
"Wiggity wack? Nope just regular type." -Team Girl Squad
"Hasa diga eebowai!" -Angry Africans.
"I find it interesting to hear all the different dialects using Purse Words that only they might understand." -random guy to stranger in alleyway