ladad
Short for lick a dick a day

Used as a pratical joke between friends when you are 8. Wasn't funny then but seemed it at the time. Isn't funny now but makes you laugh if u remember thefirst time u heard it.
kook1: Hey do you ladad?
kook2: What the fuck are you talking about?
kook1: Do you ladad?
kook2: Go away!
Kook1: Well do you?
kook2: I dunno... Yes?
kook1: Ha ha ha ha you lick a dick a day
kook2: Dude you are so retarded!
Kook1: Snigger