To donkey-head someone:
Dude 1-Hey u know I just got a winning lottery ticket!!
Dude 2-How the heck do u know it's a winning ticket?
Dude 1-Those guys sold it to me: they said they
don't need money...I got it for just 20k.
Dude 2-U do realize u've been donkey-headed big
time, don't you?
Dude 1-"uh-auha-uha" (or
whatever a donkey is able to utter)