Joke Collection Website - Cold jokes - What does tf Junior go mean by the last sentence of Karry's cold joke in the third season?

What does tf Junior go mean by the last sentence of Karry's cold joke in the third season?

This is an online joke, which seems to be true.

A man in the elevator gave chocolate to everyone except him. He felt that he didn't, so he asked for it.

At a certain floor, everyone except him went down, only to find that everyone knew each other, so he gave chocolates to the people he knew, and he was a stranger, but he reached out and asked for something to eat.

Is it funny?