Back in the late 70s when I was about 6 or 7 I used to sleep over my aunt's house from time to time. My cousins were teens at that point. They listened to a lot of disco and everytime I heard a song with the word "boogie" in it, I thought that they were referring to boogers.
"Get Up And Boogie" to me meant stop dancing and clean all the boogers out of your nose. LOL!!!
A childhood belief about songs

others believed things like this
- I thought the Boogie Man was made of boogers-all green and slimy.— Boo
- i used to think that my dad turned into the boogie monster at night if i picked my nose before i went to bed— hollie
- I used to think that my dog was the "BOOGIE MONSER" because he would always go and sleep under my bed!— ChristieGirl
- I used to beleive that if I picked my nose the boogie monster would visit me in the night + torture me— gingalinga
- I used to think there were little booger factories in your nose that made boogers.— Melith
- My brother used to believe that dried out boogers were actually "paving" the inside of your nose. — sm