Verb. A contraction or blending of the words 'talk' and 'fuck'.
To falk is to hold an erotic conversation, by telephone or IM, ideally leading to a long-distance orgasm by both parties.
falked, falking, falker.
He'd call, and we'd falk for hours.
I love the way you falk to me!
A master of words, his IMs would falk me into ecstacy