TOO GLIB can be defined as speaking in a way that is too casual or offhand. The crossword solutions for this term are OILY (4 letters) and PAT (3 letters). OILY can be used to describe someone who speaks in a slick or insincere manner, while PAT can refer to someone who speaks in a rehearsed or overly-polished way. Together, these two words provide an accurate description of someone who speaks in a TOO GLIB manner.