I would think it has personal meaning that only the one getting the tatoo understands.
waterfall
little waterfall little waterfall
Waterfall is an HM that, if taught to a Pokemon, allows you to climb up a waterfall.
It means waterfall.
waterfall
'cascade' or 'chute d'eau'
it means that we are constantly moving.
Sahalie is a Native-American name and it is a waterfall in Oregon.
Bailey means "bailiff," and Lynn is said to mean "waterfall."
limpopo means waterfall in zulu, xhosa,siswati and ndebele.
To my knowledge i don't think there is a waterfall in Pokemon yellow and it is quite irrelevant to the storline if there was one. If you mean a HM named waterfall...i think your on the wrong game, only pearl and diamond have waterfall HM...i think. There are only 5 HM's in Pokemon Yellow Flash, Cut, Fly, Surf, Strength.
a waterfall.