A pineapple tattoo can have several possible meanings. Pineapples are a symbol of warmth, welcome, and hospitality. Swingers also use pineapples as a simple symbol to identify themselves. The wearer of the tattoo might be a swinger - especially if the tattoo is upside down. The wearer may just like the funky-looking fruit. Tattoos are very personal. And the pineapple tattoo may not have any special meaning at all.