tsktsktsk 

Used to hint at sonething, usage of onomatopoeia here.
Usually used online rather than said out.
When spoken, sounds like tss-tss-tss.

A: "I'm so disappointed in you. tsktsktsk."
(B is looking at some girls etc.)

tsktsktsk by starracer0101 May 12, 2011

Tsktsktsk 

something used by dumb bitches who think they're cool

save the turtles, tsktsktsktsktsktsktsktsk, (drops hydro flask) and i -oop

Tsktsktsk by Your Stepbro September 25, 2019

Tsktsktsktsktsk

This is actually a term used by stupid people who actually think it is a very cool word to use in this era.

I hate my job tsktsktsktsktsk

Tsktsktsktsktsk by Laudyia August 25, 2019