Filp

Filp is a replacement of flip witch is a replacement of frick witch is a replacement of fuck.
so so you can use this term to mock people who are acting childish.

GO FILP YOURSELF

Right back at ya

In an argument right back at ya is a cheap way of making a comeback without actually making a comeback, this is considered childish.

me: you have no capability to make a comeback or response
dumbass: Right back at ya
me: you have no capability to make a comeback or response