The combining of the word "bro" and "Competition".
Used when you are having a competition to see who can hook up with the most girls, or drink the most beers, ect.
Dude. i totally won that bromp
The Bromp had officially started
Who ever hooks up with July first wins the Bromp
1. To dome up 24-year-old men
2. To lose your V-card to a 24-year-old man
3. To lose your V-card in Arizona
Hayley was bromping the 24-year-old dude for so long that her mouth began to tire.