1 definition by Schuman Heinrick

Top Definition
When you concentrate at a hot girl to make yourself hard, to create affection towards your penis using your mind.
I saw a hot girl at school, i cockcentrated on her when i got back home.
by Schuman Heinrick June 27, 2010

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