The result of millions of years of evolution. Originally used by cave men to signal it was time to rest.
Man Amber, your yawn was contagious...I too am tired.
by Trevor May 10, 2004
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
Can you define these popular missing words?