a combination of the words draw and paint. made by Moriah Elizabeth in her ‘Fixing Things I’ve Ruined #2’ video. it was used in the context of drainting her paint palette with paint pens.
draint draint means paint with posca pens. Youtuber Moriah Elizabeth, invented that word when she was making her first video with posca pens and then, she kept saying it for every time she painted with posca, example of draint in box below.