A sexual activity involving blood. Humping- when blood is involved.
Bill and Lorena were totally blumping on the sheets they killed those people on.
Adj, To hump a girl whilst she is on her period, using the blood as lubricant.
e.g harry was blumping sally while she was on her rags. Her menstrual blood made for a good cheap lubricant
Snorting cum through the nose (as a coke-head would do with cocaine).
"I banged this girl the other day, she loved my cum so much that she grabbed a straw and started blumping right there in the bed."
Having sex on a cross country train.
he was blumping amanda all the way to florida!