A very excited version of hello in written form. Usually displayed with tons of extra "g's" and "s's". This is meant to express someone so exicted to see you that a visual of someone tackling and hugging at the same time comes to mind.
KittyTrishia will always tackle hug someone she loves in the #sdchat room.
KittyTrishia: TACKLEEEEEEE HUGGGGGGGGGGGGGGGGGGGGGGSSSSSSSSSSSSSSssssSSSSSSSSSSSSS! Long time no see!