What is this movie called?

i forgot the name of this really good movie, okay well its about a dude that meat another dude at a airport and well people kicked them off because they thought they where terorist and so he gets a ride with this dude.AND THIS ONE DUDE BTW HE HAS A PERM D:. but yeahh he keeps his dads ashes in a cofee container. andddd he smokes alot of bud. soo please help me this movie is my ishh. and i want to watch it again so hurryyy up and help me out thank you and love you all