Both are a play on words.
Default
Swishnu
Apricots. I used to love this joke when I was a little kid and told it over and over. I'm still a little in love with it for that reason. What are some of your favorite jokes from when you were a little kid?
an explosive punchline
A "moderator", apparently.
Neighbor
Steven Wright joke, iirc.
The Thesaurus