Couple of ideas:
- Arte Suave (obvious really)
- Depending on your country pride, maybe an off-colour (grey-black) flag? As there aren't THAT many home-grown brownbelts
- Any quote that has most deeply influenced you, preferrably from your teacher. Something that keeps popping up in your head.
- "Clock choke fa***ts that turtle" (Faixa Rua)
- No Air, no blood, no hope! (Stole that one from somewhere)
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And my favourite:
- Along the lines of "I am a shark, the ground is my ocean and most people don't even know how to swim.", you could put:
"The water is getting deeper..." :icon_chee