TTLY means "totally", which is usually used in msn lingo. this is commonly confused with TTYL which means "talk to you later".
no way colin, she's ttly not a biz-natch. she just doen't know anyone.
av BigRigMerhe 6. februar 2008
Can you define these popular missing words?
short-form for totally
"Isak is shit."
av pr00t 16. januar 2004
Commonly used on instant messaging, an abbreviation for "totally". Most often misread and mistaken for ttyl.
Jack: r u comin ova later??
av smurph 30. juli 2006