chest bump
when two or more people jump into each other and bump their chests, as a fiendly bump usually. For females this may be painful.
Nicole and Josh did a chest bump. Nicole was hurt badly though, she had to cry because she squashed her boobs which is painful/.
greesy chest bump
When you cum on a girls chest, then she jumps on you and rubs it all over your chest
I just got back from giving my boyfriend a greesy chest bump.