An undulating kiss is a kiss performed by moving from side-to-side or back and forth , more like an intense french kiss that might go even more sexual if its going up and down you get what i mean?
"An undulating kiss is what i need right now" said the professor looking at the girl titled teachers's pet...
An insult focused on hurting someone that is deflected easily or has lost it’s meaning because either that person doesn’t care, is what you are describing, or the roast/insult just makes no sense and sucks.
Here are some examples:
Moron: Hahaha you are a nerd. Probably Asian
Smart kid: I am Asian?
Moron: Oh ok
Smart kid: That was unsulting
Moron: Whats that me-
Smart kid: FUCKING GOOGLE IT MORON
Example 2:
Teammate on CoD MWF: Ur gay Gay person: And? What about it?
Salty kid: You are a... uh.... uhhhhh. Moldy stick!
Other salty kid: What does that even mean you fucktard?