1 definition by white thunda

Top Definition
To sexile your roommate in order to beat off. No contact with another living, breathing organism is actually involved.
God damn't! My roommate masterbiled me again. He should just get a girlfriend.
by white thunda April 12, 2009

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