The use of ur mum calls has become quite stale over the past few years, mainly due to overuse and widespread acceptance of the term. Whilst the call 'ur dad' could be considered homosexual around strangers, incorporation in a group of friends is easy and quite amusing. Use of 'ur dad' in conjunction with 'i fucked...', '...fisted me' and 'me and ... fucked ur mum last night' are just some of the many ways the joke can be used.
Jeffrey: "fuck ur a dick head"
Trent: "ur dad has a dick which i fuck and suck"
Jeffrey: "now ur a fucken queer"
Trent: "ur dad and i are queers together"
Jeffrey: "dont talk to me"
Trent: "ur dad cant talk when he's got my cock in his mouth"
Jeffrey: "ah ha ha, i'll pay that"
The opposite comeback of "ur mom," which was a shitty comeback to begin with, so "ur dad" sucks just as bad if not worse.
Andy: I'm going to work tomorrow.
Kevin: Ur dad goes to work tomorrow.
Andy: Fuck off, that comeback sucks as bad as ur mom.
the opposite of ur mom.....supposedly..it is a term that is exceedingly cooler than ur mom.. <when someone chooses to express themselves in conversation, by saying "ur dad," instead of "ur mom," they are instantaneously cool and fwegin sweet...
(me-cooler): Who's your mom?
(me): -UR DAD