Short joke or witty remark (3-5)
I believe the answer is:
one-liner
I believe this is a double definition.
'short joke' is the first definition.
(I've seen this before)
'witty remark' is the second definition.
(I've seen this before)
(Other definitions for one-liner that I've seen before include "Quick quip?" , "Witty remark consisting of a short sentence" , "Witty remark contained in a single sentence" , "Flat, smooth" , "Terse joke" .)