fuckyoudude 

is slang to insult some one who has recently insulted you or it is used to cut some ones sentence short. It is said in a fast manner to show that it is one word.

dude your sister is such a slut.(Ryan) Fuckyoudude.(Noah)

fuckyoudude by John Randall January 1, 2009

fuckyoudad 

A phrase exclaiming hatred for a father figure

*says something dumb and probably racist* "fuckyoudad"

fuckyoudad by Coochieballlz October 21, 2021