This t-shirt is supposed to be a funny play on words for what is a relatively common saying. Typically used in situations where a person feels supremely confident in their skillset to do a particular thing well it serves as a boastful brag. For some of us though, there may be a more literal meaning to the phrase. Luckily for us this phrase is so common that those who don't know any better won't think much of it. • Ceramic • 11 oz mug dimensions: 3.79″ (9.6 cm) in height, 3.25″ (8.3 cm) in diameter • 15 oz mug dimensions: 4.69″ (11.9 cm) in height, 3.35″ (8.5 cm) in diameter • Dishwasher and microwave safe • Blank product sourced from China