For totes ser is an abbreviation for totally serious. The for is unnecessary, it simply rolls off the tongue.
Let's say you approach me with a question such as: "Jon, did you shoot that hoe?" Then I would respond "Why yes Jake... I'm for totes ser." As in I am being (for) totally serious.
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