Term: lacubrious
Example: "1 : chill out; especially : exaggeratedly or affectedly becoming less tense or reserved < " i can be lacubrious wit' you
Definition: la·cu·bri·ous  pronunciation: la-'cü-bre-&s also -'cyü- function: adjective etymology: irregular derived with a positive twist from lackadaisical created in 1994