Idioms
1.
Taking the piss
Taking the Mickey
Extracting the Michael
All these (and more) mean teasing you, ribbing you, joshing with you
2.
Winding you up means deliberately goading you into a reaction
3.
Throwing your toys out of the pram
Spitting out your dummy
These mean behaving childishly
4.
WUM means Wind Up Merchant (see2)
Anyone care to add to the list of idioms we use on here?
Here's some more for those who are confused!
http://www.ef.co.uk/english-resources/english-idioms/