stupid, annoying, etc....
usually used to be kidding around, not to be mean or actually insulting someone
Leah:blah blah blah annoying babbling!!!
Me: Shut up ,you tardmuffin.. haha
Another work used to describe an idiot or someone just did something that you didn't like.
:::Supervisor Lauren puts a new policy into effect that is really stupid:::
Lauren you're a tard muffin
Two goofballs acting silly randomly that have random silly conversations.
Alec: Lets go throw some of those nasty nuts that no one likes at squirrels so they eat them and then they spit them out because they are so gross!
Kelly: Haha! You're such a tard muffin!
a retarted queer asshole with a big ego
"Oh my God its nick guellman... what a tardmuffin"
a person who has a big head and is a retard
A muffin that is so utterly shmooey that it smashes it's head against solid concrete until anal marmalade oozes out of it's mouth.
You are such a tardmuffin!
shit that your girfriend eats
i gave her a tard muffin last night