kind of like a double chin or a triple chin, except a thanos chin is an ∞(infinity) chin, used to describe very fat people with ugly chins.
by craisins.inc June 14, 2018

Tyler: Hey jeff, guess what?
Jeff: What?
Tyler: I heard Erin turned down Kyle because he has a huge, dirty dick chin.
Jeff: What?
Tyler: I heard Erin turned down Kyle because he has a huge, dirty dick chin.
by T-Harmony April 19, 2009

A patch of hair grown on the chin that looks like a chin strap for a football helmet. Similar to a goatee.
Jimmy was so proud because after months of practice, he was finally able to grow and perfect his chinstrap beard.
by Michael Eric Brown June 1, 2005

by Grant November 17, 2003

by Sasquatch Jones September 18, 2008

by Johnny S. December 7, 2019

by brit.brit August 3, 2006
