It's a sentence from Tae Kim's grammar guide:
崇君{たかしくん}は漫画{まんが}ばっかり読{よ}んでてさ。 かっこ悪{わる}い。
The 「て」 that appears after the te-form of 「読む」 and before 「さ」, what is it and what effect does it give? Possibly a colloquial-only thing?
I appreciate the help.