Top definition
When a person on twitter, usually female, is not as attractive in person as they seem to be in their avi/twitter pictures. Usually due to filters/excessive makeup.
"Dude, remember that chick whose DM's I dove into last week after she posted that cleavage-heavy selfie?"

"Yeah man. Looks great in her avi, why?"

"I ran into her last night. Biggest case of twitception ever. She was a COW."
by Gb96 March 09, 2014
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug