2
used to describe the lesser spotted black winged species of the femunine Frank;
Francesca, she can mostly be found in the regions of minster, annoying wills (see will)and doing random side ways dancing. Can be used as an adjective to describe something marvellous and slightly wierd.
My look at that wierd talking cat, it's most frantastic!

Gertrude: my knicker elastic is so marvellously tight today, there is no sign of my pants falling to me knees.
Edna: My Gertrude that is most frantastic, where did you buy those knickers?
by sp-funkycat January 27, 2009
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3
like fantastic, but even better. can only be said by someone called fran, frances, francesca etc.
Christine: wow, Fran taste this new drink i found, its called 'surprisingly fran'
Fran: oh my god, that is frantastic! it tastes so good!

by surprisingly fran January 22, 2006
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5
something or someone is overly fantastic that they are frantastic
I just had some frantastic bread!
by lani lag October 02, 2017
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