What is Mmhmm?
1.
Used to show sly agreement
You have three testicles?
Mmmhmm
2.
a sound you make to express disinterest OR tremendous interest depending on the tone used
"Hey, check out my collection of bottle caps"
disinterested response: "mmhmm"
OR
"Hey check out my wifes new tits!!"
response: "MMMMMMMMMHMMMMMMMM"
See
3.
Something you say when agreeing with someone, like the lazy "yes."
I am going to get me some tonight!
mmhmm!
See
4.
kind of agreeing, but not really
Johonny: do you want some pig ears?
Me: mmhmm
See