What does bump and grind mean?

bump and grind meaning in Urban Dictionary

You will definitely often see this at highschool dances, golf clubs, and Gay bars. The bumb and grind is simply a sexual tease if you notice it up close or a far it appears to be like ur having sex with garments on. This means its a dance where a couple of people dry hump eachother.

bump and grind - German to English

bump 'n' grind (dance)