An exceedingly cute way of saying thanks, as used between lovers or when the speaker wishes to imply an element of childish gratitude
*hands the gf the remote*
he: "here you are my darlink!"
she: "fankoo" *smiles*
*bystander rolls eyes and shakes head, grinning*
he: "here you are my darlink!"
she: "fankoo" *smiles*
*bystander rolls eyes and shakes head, grinning*
by Sassielassie September 10, 2006
Devolution of 'Thank-you'.
by Gumba Gumba February 25, 2004