Its when you respond to either irony or sarcasm with more irony or sarcasm, respectively. More commonly referred to as “playing along.” Double humor, however is more specific than playing along because it may be without the knowledge or consent of one or more parties involved in the “double joke.”
Harry: Amanda, why are you such a whore?!?!?!?
Amanda: Because I like sleeping around!!!
Harry: But that could get you infected with many STD’s!
Amanda: What? …
Harry: That's double humor.
Amanda: Because I like sleeping around!!!
Harry: But that could get you infected with many STD’s!
Amanda: What? …
Harry: That's double humor.
by hadoublery July 10, 2011

In an era of people always having their phones on do not disturb mode (DND), the need to call twice in 3 minutes to break-through DND
1: I couldn't reach Jack's phone
2: Oh, he probably has his phone on DND while studying. Double-call him
2: Oh, he probably has his phone on DND while studying. Double-call him
by md.caffeiner October 25, 2022

When you put a fist in a girls ass and vagina. You then spread out your fingers while inside of her and make an explosion noise. While making the explosion noise you pull your hands out as quickly as possible.
I gave that bitch a double hand grenade then dropped her off at the hospital. The doctor said that she won't walk correctly for weeks.
by Brotner August 14, 2017
