Unusual occurance in the woman's birth canal (sexual organ). When a raging tropical storm is taking place in the vagina. Usually caused by depression or great stress and comes out in the form of thunder and lightening. In more extreme cases vaginal secretions shoot out from the vagina said to be rain from the thunder cunt.
I swear to you Danny, I was about to insert when I heard a loud bang. Then a bolt of lightning shot out and clean burned off my pecker. The bitch had a thunder cunt.
A thunder cunt is well... a cunt but with THUNDER. Sometimes calling someone a cunt is boring. Too spice it up the term thunder is put before it to make it better.
One of my favorite insults to call someone on the internet and I still need to use it in real life.
To Call someone a thundercunt one must deserve it.
1:Hey you! shut the fucking hell up you turd guzzling ball sack gobbling cum guzzling ass ramming testicle gobbling butt fucking thunder cunt faggothoe.
Go piss on an electric fence you blasted thunder-cunt
Mother of all cunts. The thunder cunt has the god like powers of Zeus and uses her cunt powers to destroy all who surround her. Beware of the thunder cunt and her crimson rage at all costs.