Top definition
Acronym for "They Can Suck It"; a term used to insult, or used as a comeback. The phrase refers to mass fellatio, as to a team, or group of people.
"OMG WTF, those cheerios called you a (insert insult)."
"TCSI"
by 5thyear_touchdown April 09, 2010
Get the mug
Get a TCSI mug for your mother-in-law Beatrix.