(a) hahahahaha :-d  (b) lol :-d  (c) lmao :-d  (d) rofl :-d
:-d is an emoticon that typically means laughing, big smile
"(a) hahahahaha :-d  (b) lol :-d  (c) lmao :-d  (d) rofl :-d" What is the definition of ":-d"?