Merp can be used as a yes ,no,or maybe,depending on the tone.It can be used to avoid answering too.
Person1:did you get my text?
Person2:(merp)
Your friend that you game with who insistently acts like a little girl.
Person: Hey, what you u----
Person 2: MEEP MERP
Person: die
Another name for the Youtuber Merpwam.
Lil' Merp in the derp in the slurp
Its like "what the fuck" but when you want to be silly and goofy
Person 1: Dude I accidentally just locked us out
Person 2: Ugh, what the merp, man!