Someone whose actions are only in their favour and in disfavour of someone else. They can be rude, unmannered and egoist.
You can name someone a țecar only when they committed a țeacă(badthing that țecars do) at that moment.
Vica ate my snack without asking me, she is such a țecar.
She usually doesn't care about anyone else besides herself, that makes her even more of a țecar.
To chat via internet, in Portuguese (Brazil). The expression neans "to type". You can also see "teclar" in bad spelling: "tc".
Got it? Nice. Now, have fun. X3