What's on your mug?

An unusually large amount of semen stored in a man's body due to lack of ejaculation

I haven't jacked off in weeks. I'm backed up.

By Mudesi

Unable to leave loaf

I ate a whole block of cheese and now I'm all backed up.

By MikePBG

adj. strong or musculer

I am a backed uped to the fullest

By Ghetto Fab

Backed up is when u haven't had pussy in so long

Bro I'm backed up, I haven't had pussy in months

By Varrrr