pop a red

When a male dog get's a boner.

I was petting my dog Bruce right before I let him inside, and he decided to pop a red right in front of me.

by Optimetrics February 27, 2009

Popped a Red Cap

To masturbate so vigorously that your penis begins to spurt blood

Ricardo popped a red cap while watching Human Centipede.

I just listened to the seminal blues song, 'Red Caps a-Poppin', by Billy B. Goode

by Sir Whoopi Goldberg July 9, 2010