To have a laugh

The other day, we saw in the Intermediate I class, the expression "to have a laugh". We said that it means "to have fun/a good time", but you can also use it meaning "pulling somebody's leg" but not with a bad intention, just for fun, or for the craic, as Irish people would say. Here is a link for further explanation on the topic.
http://forum.wordreference.com/showthread.php?t=1149790