when something is so yummy and orgasmic at the same time
did you see ahmed in a suit yesterday, he was so yumtastic
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a cross between yummy and fantastic. it happened to fall out of my mouth one day when i was mad.
'Oh wow, that sweetie is yumtastic!'
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A made up word used in the language of posh that must be spoken in an over accentuated fashion to describe pleasantry to the taste buds.
Mmmm ya-ya that is like, totally yumtastic ya.
When one is in a relationship with the pile of candy sitting in their room since Easter of 2014
Damn I'm so yumtastic with those jolly ranchers