{adv. phr.} Merely as a matter of amusement. * /"I'll bring a goat to class," Bob said to his classmates, "just for the fun of it; I want to see what kind of a face Professor Brown will make."/
JUST FOR THE FUN OF IT
Meaning of JUST FOR THE FUN OF IT in English
Slang English vocab. Английский сленговый словарь. 2012