If something is Flantastic it is extremely
jewish, sticky, and dirty. A flantastic item would be something like a used uncleaned
double-dong and doing a flanstastic deed would be like giving yourself or another person the reverse
shocker.
If someone is called flantastic it means they are easy, slutty, and/or dirty.
Dude that bitch was so flantastic in bed! She let me use her any way I wanted!!