Top definition
Used to describe a girl with great looking or big breasts. Added nerd value because of Transformers reference.
Did you see Charlie's new girlfriend?

Oh yeah! Racktimus Prime for sure!
by dsource May 20, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug