A mondegreen is the mishearing (usually accidental) of a phrase as a homophone or near-homophone in such a way that it acquires a new (funny) meaning.
“Almost Cut My Hair”
David Crosby
“Like looking into a mirror and seeing a Polish car”
Real Lyrics: Like looking into a mirror and seeing a police car
“Chicago”
Graham Nash
“And they’ve changed him into a chair”
Real Lyrics: And they’ve chained him to a chair
“Cowgirl In The Sand”
Neil Young
“Hello movie in the dark”
Real Lyrics: Hello ruby in the dust
“Don’t Let It Bring You Down”
Neil Young
“Can you hear the silent moon?”
Real Lyrics: Can you hear the sirens moan?
“Faith In Me”
Stephen Stills
“Masturbate with me”
Real Lyrics: Have some faith in me
“Helpless”
Neil Young
“Sweet comfort memory despair”
Real Lyrics: With dream comfort memory to spare
“Helplessly Hoping”
Stephen Stills
“Her hard-lickin’ lover’s nearby”
Real Lyrics: Her harlequin hovers nearby
“Ohio”
Neil Young
“Four dead in Ohio – Five!”
Real Lyrics: Four dead in Ohio – Why?
“Old Man”
Neil Young
“Old man look at my wife, I am in love like you were”
Real Lyrics: Old man look at my life, I am a lot like you were
“Marrakesh Express “
Graham Nash
“Don’t you know we’re writing American Express”
Real Lyrics: Don’t you know we’re riding on the Marrakesh Express
“Southern Cross”
Stephen Stills
“I have been all around the world, looking for that Mormon girl”
Real Lyrics: I have been all around the world, looking for that woman/girl
“Suite: Judy Blue Eyes”
Stephen Stills
“Ruby, throw dead sparrow”
Real Lyrics: Ruby throated sparrow
“Teach Your Children”
Graham Nash
“Can’t know the fears, that you ever screw by”
Real Lyrics: Can’t know the fears, that your elders grew by
“You who are on the road must have a coat”
Real Lyrics: You who are on the road must have a code
“The one-day bitch”
Real Lyrics: The one they pick’s