Do you speak slangs randomly or just when u r Very Angry or u addicted????

i speak it randomly when i am not at home, not because i love to but because in the environment or friends there is lot of slang import and export so it has become my habit just speak it for FUN not to curse somebody... if something wrong happens then
"OH S-HIT", "OH FU-K", if anybody drives by with high speed then"FU-K YOU BULL FU-KER".....